BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//ConQuMat - TRR360 - ECPv6.15.20//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://www.trr360.de
X-WR-CALDESC:Events for ConQuMat - TRR360
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Berlin
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20220327T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20221030T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20230326T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20231029T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20240331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20241027T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20250330T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20251026T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20260329T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20261025T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20250129T140000
DTEND;TZID=Europe/Berlin:20250129T150000
DTSTAMP:20260511T135732
CREATED:20241122T165746Z
LAST-MODIFIED:20241122T165747Z
UID:4443-1738159200-1738162800@www.trr360.de
SUMMARY:TRR 360 Seminar: Tba Mark Goerbig
DESCRIPTION:Tba \nProf. Mark Goerbig \nUniversité Paris Sud\, Orsay \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-seminar-tba-mark-goerbig/
LOCATION:Technical University Munich + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241218T140000
DTEND;TZID=Europe/Berlin:20241218T150000
DTSTAMP:20260511T135732
CREATED:20241122T165601Z
LAST-MODIFIED:20241217T122653Z
UID:4439-1734530400-1734534000@www.trr360.de
SUMMARY:TRR 360 Seminar: Directional amplification\, non-Hermitian topology\, and optomechanical realisation of the bosonic Kitaev chain Andreas Nunnenkamp
DESCRIPTION:Directional amplification\, non-Hermitian topology\, and optomechanical realisation of the bosonic Kitaev chain \nProf. Andreas Nunnenkamp \nUniversität Wien \n\nDirectional amplification\, in which signals are selectively amplified depending on their propagation direction\, has attracted much attention as a key resource for applications\, including quantum information processing. I will present a unifying framework based on non-Hermitian topology to understand non-reciprocity and directional amplification in driven-dissipative cavity arrays. Specifically\, I will unveil a one-to-one correspondence between a non-zero topological invariant defined on the spectrum of the dynamic matrix and regimes of directional amplification\, in which the end-to-end gain grows exponentially with the number of cavities. I will show how to restore the bulk-boundary correspondence for one paradigmatic class of non-Hermitian Hamiltonians. Finally\, I will present experiments on a bosonic analog of the fermionic Kitaev chain in an nano-optomechanical network. Our work opens up new avenues in topological photonics and non-Hermitian phases of matter.\n \nC.C. Wanjura\, M. Brunelli\, and A. Nunnenkamp\,\nTopological framework for directional amplification in driven-dissipative cavity arrays\,\nNat Commun 11\, 3149 (2020).\nhttps://doi.org/10.1038/s41467-020-16863-9\n \nM. Brunelli\, C.C. Wanjura\, and A. Nunnenkamp\,\nRestoration of the non-Hermitian bulk-boundary correspondence via topological amplification\,\nSciPost Phys. 15\, 173 (2023).\nhttps://scipost.org/10.21468/SciPostPhys.15.4.173\n \nJ.J. Slim\, C.C. Wanjura\, M. Brunelli et al.\,\nOptomechanical realization of the bosonic Kitaev chain\,\nNature 627\, 767 (2024).\nhttps://doi.org/10.1038/s41586-024-07174-w\n\n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-seminar-tba-andreas-nunnenkamp/
LOCATION:Technical University Munich + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241204T140000
DTEND;TZID=Europe/Berlin:20241204T150000
DTSTAMP:20260511T135732
CREATED:20241122T165404Z
LAST-MODIFIED:20241122T165405Z
UID:4435-1733320800-1733324400@www.trr360.de
SUMMARY:TRR 360 Seminar: Tba Urban Seifert
DESCRIPTION:Tba \nDr. Urban Seifert \nTU Dresden \n  \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-seminar-tba-urban-seifert/
LOCATION:Technical University Munich + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241112T160000
DTEND;TZID=Europe/Berlin:20241112T170000
DTSTAMP:20260511T135732
CREATED:20241107T102110Z
LAST-MODIFIED:20241112T154938Z
UID:4333-1731427200-1731430800@www.trr360.de
SUMMARY:TRR 360 Seminar: Multi-Extreme THz ESR Study of the Pressure-Induced Phase Transition in the Shastry-Sutherland Model Substance SrCu2(BO3)2 Hitoshi Ohta
DESCRIPTION:Multi-Extreme THz ESR Study of the Pressure-Induced Phase Transition in the Shastry-Sutherland Model Substance SrCu2(BO3)2 \nProf. Dr. Hitoshi Ohta \nMolecular Photoscience Research Center\, Kobe University\, JapanResearch Center for Development of Far-Infrared Region\, University of Fukui\, Japan \nWe have been developing THz ESR under multi-extreme conditions\, such as high magnetic field\, high pressure and low temperature in Kobe. It covers the frequency region between 0.03 and 7 THz\,1 the temperature region between 1.8 and 300 K\,1 the magnetic field region up to 55 T\,1 and the pressure region is extended from 1.5 GPa2 to 2.5 GPa using the hybrid-type piston-cylinder pressure cell.3 It also includes mechanically detected ESR4 measurements using a commercially available membrane-type surface stress sensor\, which is the extension from our micro-cantilever ESR5. As an example\, application of high pressure THz ESR to understand the pressure-induced phase transition in the Shastry-Sutherland model substance SrCu2(BO3)2 will be discussed. Using our technique\, we were able to determine the pressure where the pressure-induced phase transition occurs\, and obtain the pressure dependence of exchange interactions in SrCu2(BO3)2 [Ref. 6]. Comparison of our results with the theory will be discussed. \n\nH. Ohta et al.\, J. Low Temp. Phys. 2013\, 170\, 511.\nT. Sakurai et al.\, Rev. Sci. Inst. 2007\, 78\, 065107\nK. Fujimoto et al.\, Appl. Mag. Res. 2013\, 44\, 893; H. Ohta et al.\, J. Phys. Chem. B 2015\, 119\, 13755; T. Sakurai et al.\, J. Mag. Res.\, 2015\, 259\,108.\nH. Takahashi et al.\, Rev. Sci. Intrum. 2018\, 89\, 036108\nH. Ohta et al.\, AIP Conf. Proceedings 2006\, 850\, 1643; E. Ohmichi et al.\, Rev. Sci. Instrum. 2008\, 79\, 103903; H. Takahashi et al.\, Appl. Phys. Lett. 2015\, 107\, 182405.\nT. Sakurai et al.\, J. Phys. Soc. Jpn. 87 (2018) 033701\n\n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-seminar-multi-extreme-thz-esr-study-of-the-pressure-induced-phase-transition-in-the-shastry-sutherland-model-substance-srcu2bo32-hitoshi-ohta/
LOCATION:University of Augsburg\, Room S-288 + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241106T140000
DTEND;TZID=Europe/Berlin:20241106T150000
DTSTAMP:20260511T135732
CREATED:20241104T134303Z
LAST-MODIFIED:20241104T140146Z
UID:4312-1730901600-1730905200@www.trr360.de
SUMMARY:TRR 360 Seminar: Imaging superconductors at high pressure using a nanoscale quantum sensor Christopher Laumann
DESCRIPTION:Imaging superconductors at high pressure using a nanoscale quantum sensor \nChristopher LaumannBoston University\, USA \n  \nPressure alters the physical\, chemical and electronic properties of matter. By compressing a material between two opposing brilliant cut diamonds\, the diamond anvil cell enables tabletop experiments to reach pressures more than a million times that of atmospheric pressure. Since its development over half a century ago\, it has enabled experiments to directly access pressure as a thermodynamic tuning parameter and has had a dramatic impact on quantum science\, chemistry and materials physics. Among these impacts\, a tremendous amount of recent attention has focused on the discovery of superconductivity in a class of hydrogen-based materials. When compressed to megabar pressures\, these so-called super-hydrides are believed to exhibit the highest known critical temperatures\, and have led to a nascent field that is equal parts exciting and controversial. Part of this controversy stems from the nature of the tool itself: especially at high pressures\, it is tremendously challenging to extract local information from within a diamond anvil cell. \n  \nWe describe a new approach to directly “see” the physics inside the sample chamber of a diamond anvil cell at ultra-high pressures. The basic idea is deceptively simple: we directly integrate a thin layer of quantum sensors\, the NV defect\, into the surface of the diamond anvil that is actually applying the pressure. We demonstrate the ability to perform optical diffraction-limited imaging of both stress fields and magnetism\, with the latter allowing us to image the magnetic field expulsion associated with superconductivity. Applying our techniques to cerium hydride\, we observe the dual signatures of superconductivity: diamagnetism characteristic of the Meissner effect and a sharp drop of the resistance to near zero. By locally mapping both the diamagnetic response and flux trapping\, we directly image the geometry of superconducting regions\, showing marked inhomogeneities at the micron scale. \n  \nPrimary ref:[1] P. Bhattacharyya et al.\, Nature 627\, 73–79 (2024). \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-seminar-imaging-superconductors-at-high-pressure-using-a-nanoscale-quantum-sensor-christopher-laumann/
LOCATION:Technical University Munich + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241030T090000
DTEND;TZID=Europe/Berlin:20241030T103000
DTSTAMP:20260511T135732
CREATED:20241024T142401Z
LAST-MODIFIED:20241024T144026Z
UID:4207-1730278800-1730284200@www.trr360.de
SUMMARY:Introduction to the electronic lab book ELabFTW
DESCRIPTION:An introduction to the electronic lab book eLabFTW is scheduled for next Wednesday\, October 31st at 9:00 a.m. in the seminar room of EPII (room 344\, north) at the University of Augsburg.This will be a hybrid seminar\, conducted in parallel online.The Zoom link and login details are provided by email to all TRR 360 staff members.
URL:https://www.trr360.de/event/introduction-the-the-electronic-lab-book-elabftw/
CATEGORIES:Sonderseminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20241022T160000
DTEND;TZID=Europe/Berlin:20241022T170000
DTSTAMP:20260511T135732
CREATED:20241014T103541Z
LAST-MODIFIED:20241016T192355Z
UID:4071-1729612800-1729616400@www.trr360.de
SUMMARY:TRR 360 Seminar: Hidden multipolar order and singlet magnetism in f-electrons systems Sergii Khmelevskyi
DESCRIPTION:Hidden multipolar order and singlet magnetism in f-electrons systems \nDr. Sergii Khmelevskyi \nTU Wien \nThe nature of order in low-temperature phases of some materials is not directly seen by experiment. Such “hidden orders” (HOs) may inspire decades of research to identify the mechanism underlying those exotic states of matter. In insulators\, HO phases originate in degenerate many-electron states on localized f-shells that may harbor high-rank multipole moments. We show how the ground-state order and magnetic excitations of a prototypical HO system NpO2\, can be fully described by a low-energy Hamiltonian derived by a many-body ab initio force theorem method. A primary non collinear order of time odd rank 5 (triakontadipolar) moments has been predicted. We show also that exotic non-chiral magnetic order in PrO2 is a results of a strong high order multipolar interactions within whole |JM> ground state multiplet. The multipolar interactions also leads to the peculiar magnetization process in PrO2 resulting in the exotic meta-magnetic transition in the applied magnetic field and fully dominate the ordinary dipolar Heisenberg exchange. \nAs has been shown by Kotliar and Haule in 2007 the canonical and perhaps most investigated metallic “hidden” order materials URu2Si2 can also develop a “hidden” multipolar order (hexadecapolar) due to localized 5f2 configuration at low temperature. Whereas at higher temperatures a hybridization of the localized 5f-levels leads to the Kondo behavior (“Kondo arrest scenario”) and at very low temperature a hidden order phase coexists with superconductivity. We reveal on basis of correlated ab-intio calculations a close analogy between normal state behavior of URu2Si2 and newly discovered heavy fermion UTe2 superconductor. \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-seminar-sergii-khmelevskyi/
LOCATION:University of Augsburg\, Room S-288 + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240723T160000
DTEND;TZID=Europe/Berlin:20240723T170000
DTSTAMP:20260511T135732
CREATED:20241014T102634Z
LAST-MODIFIED:20241014T102933Z
UID:2399-1721750400-1721754000@www.trr360.de
SUMMARY:TRR 360 Seminar: Strain Tuning of Frustrated Magnets and Mott Insulators: Stress Reduces Frustration Andrej Pustogov
DESCRIPTION:Strain Tuning of Frustrated Magnets and Mott Insulators: Stress Reduces Frustration \nAndrej Pustogov TU Wien \nTuning materials properties on demand is at the heart of condensed matter science. Charge transport and magnetism are strongly linked to the overlap of electronic wave functions and can be\, thus\, manipulated by varying the electronic bandwidth through chemical substitution or physical pressure. Yet\, a controlled variation of the symmetry\, anisotropy and frustration of transfer integrals and exchange interactions remained inaccessible so far. \nHere\, we explore Mott insulators subject to strong antiferromagnetic interactions\, where geometrical frustration suppresses magnetic order entirely [1\,2] or down to very low temperatures TN << J [4\,7]. Utilizing the recent advancements in strain tuning of unconventional superconductors [8\,9]\, we apply uniaxial stress to fine-tune the Mott transition with unprecedented precision in a triangular-lattice compound [2]. Through the slope of the metal-insulator boundary in the temperature-pressure phase diagram we pinpoint the nonmagnetic ground state of the most intensely studied quantum-spin-liquid candidate [1-3]. By applying in situ uniaxial pressure to a clean\, well-studied kagome-lattice compound without disorder [4-6]\, we obtain direct control of antiferromagnetic order within one single crystal [7]. As the applied stress reduces the frustration strength\, TN is enhanced by 10% [7]. Our pioneering endeavors [2\,7] demonstrate uniaxial strain as a powerful tool to tune interacting spins on frustrated lattices – towards stabilizing novel\, exotic\, possibly even quantum entangled spin states. \n[1] B. Miksch\, A. Pustogow\, M. Javaheri Rahim\, A. A. Bardin\, K. Kanoda\, J. A. Schlueter\, R. Hübner\, M. Scheffler\, M. Dressel\, Science 372\, 276-279 (2021)[2] A. Pustogow\, Y. Kawasugi\, H. Sakurakoji\, N. Tajima\, Nat. Commun. 14\, 1960 (2023)[3] Y. Kawasugi\, S. Yamazaki\, A. Pustogow\, N. Tajima\, J. Phys. Soc. Jpn. 92\, 065001 (2023)[4] P. Puphal\, M. Bolte\, D. Sheptyakov\, A. Pustogow\, K. Kliemt\, M. Dressel\, M. Baenitz\, C. Krellner\, J.\, Mater. Chem. C 5\, 2629 (2017)[5] T. Biesner et al.\, Adv. Quantum Technol. 2022\, 2200023 (2022)[6] D. Chatterjee et al.\, Phys. Rev. B 107\, 125156 (2023)[7] Jierong Wang\, Y.-S. Su\, M. Spitaler\, K.M. Zoch\, C. Krellner\, P. Puphal\, S.E. Brown\, and A. Pustogow\, Phys. Rev. Lett. 131\, 256501 (2023)[8] C.W. Hicks et al.\, Science 344\, 283 LP (2014)[9] A. Chronister et al.\, npj Quantum Mater. 7\, 113 (2022) \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-seminar-andrej-pustogov/
LOCATION:University of Augsburg\, Room S-288 + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240717T140000
DTEND;TZID=Europe/Berlin:20240717T150000
DTSTAMP:20260511T135732
CREATED:20240426T093629Z
LAST-MODIFIED:20240716T141411Z
UID:2158-1721224800-1721228400@www.trr360.de
SUMMARY:TRR 360 Seminar: Discerning and mitigating complex quantum correlations in many-body dynamics Jan Budich
DESCRIPTION:Discerning and mitigating complex quantum correlations in many-body dynamics \nJan BudichTU Dresden \nThe proliferation of complex quantum correlations in many-body dynamics poses a formidable challenge both to quantum information science at a fundamental level and to classical variational approaches such as tensor network methods at a practical computational level. In this talk\, after a brief introduction to the broader field\, we discuss two of our recent contributions towards discerning various sources of quantum correlations and mitigating dynamical growth of entanglement. First\, noting that entanglement depends on how a system is partitioned into subsystems (entanglement cut)\, we explore the potential of dynamically adjusting the entanglement cut as a strategy for reducing entanglement growth. Second\, regarding the dynamics of mixed states such as locally perturbed thermal states\, we demonstrate how tools from differential geometry such as parallel transport can be harnessed to tame the temporal growth of quantum correlations in a purified state corresponding to the physical mixed state. \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-seminar-jan-budich/
LOCATION:Technical University Munich + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240628T100000
DTEND;TZID=Europe/Berlin:20240628T110000
DTSTAMP:20260511T135732
CREATED:20240627T140038Z
LAST-MODIFIED:20240627T141259Z
UID:3372-1719568800-1719572400@www.trr360.de
SUMMARY:TRR 360 Sonderseminar: Optimization and Application for Cryogenic Magnetic Refrigeration Using Yb-based Intermetallic Compounds Yasuyuki Shimura
DESCRIPTION:Optimization and Application for Cryogenic Magnetic Refrigeration Using Yb-based Intermetallic Compounds\nProf. Dr. Yasuyuki Shimura\nHiroshima University\, Japan \n\n\n\n \n\n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-sonderseminar-optimization-and-application-for-cryogenic-magnetic-refrigeration-using-yb-based-intermetallic-compounds-yasuyuki-shimura/
LOCATION:University of Augsburg\, Room 242-R
CATEGORIES:Sonderseminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240627T140000
DTEND;TZID=Europe/Berlin:20240627T150000
DTSTAMP:20260511T135732
CREATED:20240625T060720Z
LAST-MODIFIED:20240625T061917Z
UID:3342-1719496800-1719500400@www.trr360.de
SUMMARY:TRR 360 Sonderseminar: Ultrafast spin-orbitronics with terahertz electromagnetic pulses Tobias Kampfrath
DESCRIPTION:Ultrafast spin-orbitronics with terahertz electromagnetic pulses\nTobias Kampfrath\nFreie Universität Berlin and Fritz Haber Institute of the Max Planck Society\, Berlin \n  \nTo take advantage of the electron spin in future electronics\, spin angular momentum needs to be transported and detected. Electric fields and temperature gradients have been shown to efficiently drive spin transport at megahertz and gigahertz frequencies. However\, to probe the initial elementary steps that lead to the formation of spin currents\, we need to launch and measure transport on much faster\, i.e.\, femtosecond time scales. \nTo achieve this goal\, we apply optical femtosecond laser pulses to induce a spin voltage in a metallic ferromagnetic layer F [1]. The resulting spin current into an adjacent layer is measured by conversion into a charge current in a layer N and detection of the concomitantly emitted terahertz electromagnetic pulse [2]. Interesting applications such as terahertz spin-conductance spectroscopy [3] and the generation of ultrashort terahertz electromagnetic pulses emerge [4]. In all cases\, the emitted terahertz signal arises from regions close to the F/N interface\, thereby making spintronic terahertz emission very interface-sensitive [5] \nThis methodology can be transferred from the spin to the so far highly unexplored orbital angular momentum of electrons. We obtain new insights into orbitronic phenomena on their natural time scales\, for example\, time-domain signatures of giant propagation lengths of orbital currents in tungsten [6]. \nFinally\, one can implement a reciprocal experimental scheme and use intense terahertz electromagnetic pulses to drive electric currents and control magnetic order on ultrafast time scales through\, for example\, Néel spin-orbit torques [7]. \n  \nReferences[1] Rouzegar et al.\, Phys. Rev. B 106\, 144427 (2022)[2] Kampfrath et al.\, Nature Nanotech. 8\, 256 (2013)[3] Rouzegar et al.\, arXiv:2305.09074 (2023)[4] Seifert et al.\, Nature Photon. 10\, 483 (2016); Rouzegar et al.\, Phys. Rev. Appl. 19\, 034018 (2023)[5] Gueckstock et al.\, Advanced Materials 33\, 2006281 (2021)[6] Seifert et al.\, Nature Nanotech. 18\, 1132-1138 (2023)[7] Behovits et al.\, Nature Communications 14\, 6038 (2023) \n\n\n\n\n\n\nFigure: Schematic of optically driven spin-orbitronic emission of ultrabroadband terahertz electromagnetic pulses from a generic F|N thin-film stack. 𝑴 is the magnetization of layer F. \n\n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-sonderseminar-ultrafast-spin-orbitronics-with-terahertz-electromagnetic-pulses-tobias-kampfrath/
LOCATION:University of Augsburg\, Room S-288 + Zoom
CATEGORIES:Sonderseminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240625T160000
DTEND;TZID=Europe/Berlin:20240625T170000
DTSTAMP:20260511T135732
CREATED:20240515T095541Z
LAST-MODIFIED:20250220T154238Z
UID:2765-1719331200-1719334800@www.trr360.de
SUMMARY:TRR 360 Seminar: Fractionalized magnetization plateaus with hidden discrete  degeneracy in metallic Kagome spin ice HoAgGe Kan Zhao
DESCRIPTION:
URL:https://www.trr360.de/event/trr-360-sonderseminar-fractionalized-magnetization-plateaus-with-hidden-discrete-degeneracy-in-metallic-kagome-spin-ice-hoagge-kan-zhao/
LOCATION:University of Augsburg\, Room S-288 + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240612T140000
DTEND;TZID=Europe/Berlin:20240612T150000
DTSTAMP:20260511T135732
CREATED:20240426T093331Z
LAST-MODIFIED:20240611T130010Z
UID:2156-1718200800-1718204400@www.trr360.de
SUMMARY:TRR 360 Seminar: Twisted Bilayer Graphene: a platform for heavy fermion physics Roser Valenti
DESCRIPTION:Twisted Bilayer Graphene: a platform for heavy fermion physics \nRoser ValentiGoethe-Universität Frankfurt am Main \nAfter a brief introduction to TBG\, we will discuss its correlated and topological properties and put forward a heavy fermion description. We will show through a combination of Hartree-Fock (HF) and Dynamical Mean Field Theory (DMFT) that such a heavy fermion picture is able to describe in a unified way many of the experimentally observed features in these materials. \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-seminar-roser-valenti/
LOCATION:Technical University Munich + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240611T160000
DTEND;TZID=Europe/Berlin:20240611T170000
DTSTAMP:20260511T135732
CREATED:20240605T123744Z
LAST-MODIFIED:20240610T133953Z
UID:2795-1718121600-1718125200@www.trr360.de
SUMMARY:TRR 360 Sonderseminar: Structure and magnetism of LMO/SMO superlattices Vasily Moshnyaga
DESCRIPTION:Structure and magnetism of LMO/SMO superlattices \nProf. Dr. Vasily MoshnyagaI. Physikalisches InstitutGeorg-August-Universität Göttingen \nHeterostructures of strongly correlated oxides\, like superlattices (SLs) of (LaMnO3)m/(SrMnO3)n ((LMO)m/(SMO)n)\, provide a rich platform for searching emergent phases at the interfaces as well as to design artificial electronically/chemically inhomogeneous materials to study the manifestations of electron-spin-lattice correlations in reduced dimensions. We studied the structure and magnetism of the LMO/SMO SLs prepared on SrTiO3(100) substrates by metalorganic aerosol deposition (MAD) technique. The role of interfacial charge transfer in the high-TC emergent ferromagnetism and the interrelations between the octahedral tilt/rotation angle\, controlled by LMO/SMO ratio\, and magnetic/thermal properties have been elucidated. Further on\, we have grown LMO/SMO SLs with gradual La/Sr compositional modulations on the scale 5-10 u.c. and studied their role in the development of high- and low-temperature magnetic phases. We propose a route to grow strongly correlated heterostructures with modulated electronic properties at the nanoscale. \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-sonderseminar-structure-and-magnetism-of-lmo-smo-superlattices-vasily-moshnyaga/
LOCATION:University of Augsburg\, Room S-288 + Zoom
CATEGORIES:Sonderseminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240611T140000
DTEND;TZID=Europe/Berlin:20240611T150000
DTSTAMP:20260511T135732
CREATED:20240610T115811Z
LAST-MODIFIED:20240610T133420Z
UID:2801-1718114400-1718118000@www.trr360.de
SUMMARY:TRR 360 Sonderseminar: Microwave spectrum analyzer based on a rapidly tuned spin-torque nano-oscillator Andrei Slavin
DESCRIPTION:Microwave spectrum analyzer based on a rapidly tuned spin-torque nano-oscillator \nAndrei Slavin \nDepartment of Physics\, Oakland University\, Rochester\, MI 48309\, USA \nA spintronic method of ultra-fast broadband microwave spectrum analysis is proposed. It uses a rapidly tuned spin torque nano-oscillator (STNO) and does not require injection locking. This method treats an STNO generating a microwave signal as an element with an oscillating resistance. When an external signal is applied to this “resistor” for analysis\, it is mixed with the signal generated by the STNO. The resulting mixed voltage contains the “sum” and “difference” frequencies\, and the latter produces a DC component when the external frequency matches the frequency generated by the STNO.  The mixed voltage is processed using a low pass filter to exclude the “sum” frequency components and a matched filter to exclude the dependence of the resultant DC voltage on the phase difference between the two signals. It is found analytically and by numerical simulation that the proposed spectrum analyzer has a frequency resolution at a theoretical limit in a real-time scanning bandwidth of 10 GHz and a frequency scanning rate about 20 MHz /ns\, while remaining sensitive to signal power as low as the Johnson-Nyquist thermal noise floor. \n    \n Andrei Slavin received PhD degree in Physics in 1977 from the St.Petersburg Technical University\, St. Petersburg\, Russia.  Dr. Slavin developed a state-of-the-art theory of spin-torque oscillators\, which has numerous applications in the theory of current-driven magnetization dynamics in magnetic nanostructures. His current research support includes multiple grants from the U.S. Army\, DARPA\, SRC and the National Science Foundation. This research involves international collaborations with leading scientists in many countries\, including Germany\, Ukraine\, France\, Italy\, and the United States. Dr. Slavin is a frequently invited speaker at magnetism conferences around the world.  \n   Andrei Slavin is Fellow of the American Physical Society\, Fellow of the IEEE\, and Distinguished Professor  and Chair of the Physics Department at the Oakland University\, Rochester\, Michigan\, USA. \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-sonderseminar-microwave-spectrum-analyzer-based-on-a-rapidly-tuned-spin-torque-nano-oscillator-andrei-slavin/
LOCATION:Technical University Munich + Zoom
CATEGORIES:Sonderseminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240522T140000
DTEND;TZID=Europe/Berlin:20240522T150000
DTSTAMP:20260511T135732
CREATED:20240426T092659Z
LAST-MODIFIED:20240522T121324Z
UID:2152-1716386400-1716390000@www.trr360.de
SUMMARY:TRR 360 Seminar:Exploring quantum impurities and measurement backaction via tensor-networksOded Zilberberg
DESCRIPTION:Exploring quantum impurities and measurement backaction via tensor-networks \nOded Zilberberg \nUniversität Konstanz \n \nTensor networks allow us to compress and efficiently represent one-dimensional many-body states. This relies on truncating small correlations and entanglement along the system’s length. At the same time\, the representation provides easy access to these correlations. My talk will be divided into three parts: (i) I will introduce a mesoscopic coupled quantum-dots system\, map it onto a Wilson chain\, and show how to study Kondo physics via the tensor network correlations as order parameters\, (ii) I will introduce how the tensor network description of a mixed state provides an easy-to-read entanglement measure for open systems\, and (iii) show how the entanglement measure allows us to better understand measurement-induced transitions (MITs).  \n \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-seminar-oded-zilberberg/
LOCATION:Technical University Munich + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240507T160000
DTEND;TZID=Europe/Berlin:20240507T170000
DTSTAMP:20260511T135732
CREATED:20240506T090347Z
LAST-MODIFIED:20240507T132358Z
UID:2405-1715097600-1715101200@www.trr360.de
SUMMARY:TRR 360 Seminar: Altermagnetism: spin symmetry prediction and photoemission observation Libor Šmejkal
DESCRIPTION:Altermagnetism: spin symmetry prediction and photoemission observation\n\n\nLibor ŠmejkalUniversity of Mainz \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-seminar-altermagnetism-spin-symmetry-prediction-and-photoemission-observation-libor-smejkal/
LOCATION:University of Augsburg\, Room S-288 + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240424T140000
DTEND;TZID=Europe/Berlin:20240424T150000
DTSTAMP:20260511T135732
CREATED:20240425T082750Z
LAST-MODIFIED:20240507T144520Z
UID:2116-1713967200-1713970800@www.trr360.de
SUMMARY:TRR 360 Seminar: Quantum criticality on compressed lattices Markus Garst
DESCRIPTION:Quantum criticality on compressed lattices \nProf. Dr. Markus Garst\nKarlsruher Institut für Technologie \n  \nAt a quantum phase transition\, the ground state of a system changes as a function of a non-thermal control parameter. In a solid\, the associated quantum critical degrees of freedom generically couple to the crystal lattice. This coupling is potentially able to change the universality class of the quantum critical point. We discuss various scenarios where this is realised. The coupling is necessarily non-perturbative when the order parameter couples bilinearly to strain as it is the case for quantum critical endpoints or nematic quantum criticality [1]. If the strain couples only to the square of the order parameter\, it is non-perturbative at weak coupling if the effective dimension d+z\, with the spatial dimension d and the dynamical exponent z\, is smaller than 2/ν\, where ν is the correlation length exponent. This criterion is\, for example\, marginally fulfilled at a Lifshitz transition of a two-dimensional metal like Sr2RuO4 [2]. We discuss in detail the quantum phase transition in the O(N) universality class with dynamical exponent z=1\, and we show that non-perturbative effects might also arise if this criterion is not fulfilled but the coupling exceeds a critical threshold [3]. \n[1] I. Paul and M. Garst\, Phys. Rev. Lett. 118\, 227601 (2017).[2] H. M. L. Noad et al. Science 382\, 447 (2023)[3] S. Sarkar\, L. Franke\, N. Grivas and M. Garst\, Phys. Rev. B 108 235126 (2023). \n\n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr-360-seminar-quantum-criticality-on-compressed-lattices-marcus-garst/
LOCATION:Technical University Munich + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240311T113000
DTEND;TZID=Europe/Berlin:20240311T123000
DTSTAMP:20260511T135732
CREATED:20240209T140608Z
LAST-MODIFIED:20240507T214038Z
UID:1274-1710156600-1710160200@www.trr360.de
SUMMARY:TRR 360 Sonderseminar: Magnetic field versus temperature phase diagram of an effective spin-1/2 zigzag chain in a magnetic semiconductor YbCuS2 Takahiro Onimaru
DESCRIPTION:Magnetic field versus temperature phase diagram of an effective spin-1/2 zigzag chain in a magnetic semiconductor YbCuS2 \nProf. Dr. Takahiro Onimaru\nGraduate School of Advanced Science and Engineering\, Hiroshima University\, Japan \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr360-sonderseminar-magnetic-field-versus-temperature-phase-diagram-of-an-effective-spin-1-2-zigzag-chain-in-a-magnetic-semiconductor-ybcus2-takahiro-onimaru-2/
LOCATION:University of Augsburg\, Room S-288 + Zoom
CATEGORIES:Sonderseminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240130T160000
DTEND;TZID=Europe/Berlin:20240130T170000
DTSTAMP:20260511T135732
CREATED:20240125T094748Z
LAST-MODIFIED:20240507T214307Z
UID:917-1706630400-1706634000@www.trr360.de
SUMMARY:TRR 360 Seminar: Controlled quantum materials Daniele Fausti
DESCRIPTION:Controlled quantum materials\nD. Fausti 1\,2\,3\n1 Department of Physics\, University of Trieste\, Trieste\n2 Elettra Sincrotrone Trieste S.c.p.a.\, Trieste\n3 Department of Physics\, University of Erlangen Nuremberg \nThe rich phase diagrams of many transition metal oxides (TMOs) is the result of the intricate interplay between electrons\, phonons\, and magnons. This makes TMOs very susceptible to external parameters such as pressure\, doping\, magnetic field\, and temperature which in turn can be used to finely tune their properties. The same susceptibility makes TMOs the ideal playground to design experiments where the interaction between tailored electromagnetic fields and matter can trigger the formation of new\, sometimes exotic\, physical properties. This aspect has been explored in time domain studies [1] and has led to the demonstration that ultrashort mid-IR light pulses can “force” the formation of quantum coherent states in matter\, disclosing a new regime of physics where thermodynamic limits may be bridged and quantum effects can\, in principle\, appear at ambient temperatures. \nIn this presentation I will review our recent results in archetypal strongly correlated cuprate superconductors and demonstrate the feasibility of a light-based control of quantum phases in real materials [2\,3\,4]. I will then introduce our new approaches to time domain spectroscopy going beyond mean photon number observables [5-10] and show that the statistical features of light can provide information on superconducting fluctuations beyond standard linear and non-linear optical spectroscopies [11]. Finally\, I will elaborate on our current research effort to use cavity electrodynamics to control fluctuations in matter and thereby the onset of quantum coherent states in complex materials [12]. \nReferences:\n[1] Advances in Physics 65\, 58-238\, 2016\n[2] Science 331\, 189-191 (2011)\n[3] Phys. Rev. Lett. 122\, 067002 (2019)\n[4] Nature Physics 17\, 368–373 (2021)\n[5] Phys. Rev. Lett. 119\, 187403 (2017)\n[6] New J. Phys. 16 \,043004 (2014)\n[7] Nat. Commun. 6\, 10249 (2015)\n[8] PNAS March 19\, 116 (12) 5383-5386 (2019)\n[9] J. of Physics B 53\, 145502 (2019)\n[10] Optics Letters 45\, 3498 (2020)\n[11] Light: Science & Applications 11\, # 44 (2022)\n[12] Nature 622\, 487–492 (2023) \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr360-test-seminar/
LOCATION:University of Augsburg\, Room S-288 + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20240116T160000
DTEND;TZID=Europe/Berlin:20240116T170000
DTSTAMP:20260511T135732
CREATED:20240123T121712Z
LAST-MODIFIED:20240507T214459Z
UID:902-1705420800-1705424400@www.trr360.de
SUMMARY:TRR 360 Seminar:  Broadband optical studies of kagome metals Ece Uykur
DESCRIPTION:Broadband optical studies of kagome metals: Electronic correlations\, localized\ncarriers and phonons\nEce Uykur\nInstitute of Ion Beam Physics and Materials Research\, Helmholtz-Zentrum\nDresden-Rossendorf\, 01328\, Dresden\, Germany \n  \nKagome metals attract a lot of attention as materials that combine two extreme features in their\nelectronic structure: Massless Dirac fermions with linear band dispersion and flat bands hosting massive\nlocalized electrons. Topological nature of the former and strongly correlated nature of the latter lead to\nmultitude of exotic phenomena\, including quantum anomalous Hall effect and novel states\, such as axion insulators. The electron dynamics of these systems is the key for understanding the proposed exotic phenomena. \nTo this end\, we employed broadband infrared and ultrafast pump-probe spectroscopy studies on\nseries of kagome metals. In this talk\, I will summarize the optical fingerprints of itinerant and localized\ncarriers\, signatures of electronic correlations\, and the interplay between unconventional carriers and\nphonons in these systems. \n  \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr360-seminar/
LOCATION:University of Augsburg\, Room S-288 + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20231205T160000
DTEND;TZID=Europe/Berlin:20231205T170000
DTSTAMP:20260511T135732
CREATED:20240209T142219Z
LAST-MODIFIED:20240507T214654Z
UID:1287-1701792000-1701795600@www.trr360.de
SUMMARY:TRR 360 Seminar: Magneto-optical detection of topological contributions to the anomalous Hall effect in kagome magnets Sándor Bordács
DESCRIPTION:Venue
URL:https://www.trr360.de/event/trr360-sonderseminar-sandor-bordacs/
LOCATION:University of Augsburg\, Room S-288 + Zoom
CATEGORIES:Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Berlin:20231108T170000
DTEND;TZID=Europe/Berlin:20231108T180000
DTSTAMP:20260511T135732
CREATED:20240209T113946Z
LAST-MODIFIED:20240507T214924Z
UID:1246-1699462800-1699466400@www.trr360.de
SUMMARY:TRR 360 Sonderseminar: The unusual electron transport in metallic Kagome nets Philip J. W. Moll
DESCRIPTION:The unusual electron transport in metallic Kagome nets \nProf. Dr. Philip J. W. Moll \nMax Planck Institute for the Structure and Dynamics of Matter \n  \nMaterials that can host different states of electronic order form a recurring theme in physics and \nmaterials science\, and they are of particular interest if they are coupled strongly. A famous \nexample are ferroelectrics\, in which electric polarization and magnetism not only coexist but are \nstrongly linked. This both unveils a rich physics of correlated states\, and also opens unexpected \napplication avenues as the coupling promises to manipulate one state by a stimulus that primarily \nacts on another – say switching magnetism using electric fields. \nRecently\, materials based on the structural motif of the Kagome web have attracted significant \nattention for their tendency to host such strongly coupled phases. In particular\, the centro- \nsymmetric layered Kagome metal (K\,Cs)V3Sb5 have entered the focus of experimental and \ntheoretical research. They host a charge-density-wave type transition at elevated temperatures \n~100K\, followed by a superconducting transition at 3K (exact values depend on composition). \nYet there is another type of electronic order which thus far eludes exact microscopic \nidentification. A series of experimental probes detects the onset of anomalous behavior around \nT’~30-40K\, including thermal Hall\, µSR\, NMR\, magnetic torque\, Kerr rotation. The anomalous \nlow-temperature state carries the characteristics of a chiral\, nematic and time-reversal-symmetry \nbreaking fluid (all of which are under most active debate currently). \nYet what crystallizes out of the current state of experimental data is a highly entangled system \nwhich is extraordinarily responsive to external perturbations. This materials main strength is \nequally its weakness\, the unusual degree of coupling between states can hinder its systematic \ninvestigation. However\, it is already clear that it provides a platform to explore strongly coupled \ncorrelated phases\, and as a result it displays a thus-far unknown electromagnetic response\, a \ndiode in which the forward direction can be switched by the application of a magnetic field. I \nwill review the current state of the field\, and discuss ongoing projects in my department. \n  \n[1] C. Guo et al.\, Nature 611\, 461-466 (2022) \n[2] X. Huang et al.\, PRB 106\, 064510 (2022) \n\n\n\n\n\n\nVenue
URL:https://www.trr360.de/event/trr360-sonderseminar-magnetic-field-versus-temperature-phase-diagram-of-an-effective-spin-1-2-zigzag-chain-in-a-magnetic-semiconductor-ybcus2-takahiro-onimaru/
LOCATION:University of Augsburg\, Room S-288 + Zoom
CATEGORIES:Sonderseminar
END:VEVENT
END:VCALENDAR