ConQuMat - TRR360

Young Researchers Forum 2025
2025-11-20 10:00 - 2025-11-21 12:00 (Europe/Berlin) | MPI for Solid State Research, Heisenbergstr. 1, Stuttgart, 70569
At this year’s Young Researcher Forum we will continue our journey through the institutions of the TRR360 and meet each other in Stuttgart at the MPI for Solid State Physics. As usual there will be lab tours, a focus lecture, time for networking and more.

Workshop: Conflict Management
2025-11-21 13:00 - 17:00 | Schloss Hirschberg, Hirschberg 70, Beilngries, 92339, Germany
Only for our female students, PhDs and postdocs!
Conflicts are a part of everyday research life and repeatedly occur not only in research projects. As commonplace as conflicts are, they are often perceived as something negative, provoke fear, and are avoided for as long as possible. However, recognizing, assessing, and addressing them constructively in time offers the opportunity to further develop oneself or one’s collaboration.
In this interactive workshop, participants will explore their own communication and conflict behavior and discuss productive ways of dealing with difficult situations. How can I address a difficult situation effectively? Which formats are suitable for creating a constructive working atmosphere? At the same time, we will look at the influence that structures have on conflicts.
The workshop will alternate between input, exercises, and exchange in small groups and plenary sessions, aiming to create a safe space for self-reflection. The focus will be on transferring what has been learned into everyday research practice.

TRR 360 Seminar:Experimental prospects on measurement-altered criticality Sara Murciano
2025-11-26 14:00 - 15:00 | Technical University Munich + Zoom
Experimental prospects on measurement-altered criticality
Prof. Dr. Sara Murciano
Université Paris Saclay, France

Quantum critical systems constitute appealing platforms for the exploration of novel measurement-induced phenomena due to their innate sensitivity to perturbations. I will devise a practical scheme for realizing measurement-altered criticality in a chain of Rydberg atoms tuned to Ising and tricritical Ising phase transitions. Projectively measuring a periodic subset of atoms alters quantum critical correlations in distinct ways that one can control via the choice of measured sites and the measurement outcomes. While this protocol relies on post-selection, the measurement outcomes yielding the most dramatic consequences occur with surprisingly large probabilities.

Venue

TRR 360 Seminar:Multiferroic conversionTsuyoshi Kimura
2025-12-17 16:00 - 17:00 | University of Augsburg, Room 242-R
Multiferroic conversion

Prof. Dr. Tsuyoshi Kimura
Department of Applied Physics, University of Tokyo, Japan

Symmetry breaking ascribed to the evolution of an order parameter is one of the most important concepts in materials physics. Representative examples are symmetry breakings in ferroic materials, such as the symmetry breaking of time reversal in ferro-magnets and that of space inversion in ferroelectrics. Recent research developments of multiferroic materials have triggered extensive studies on unconventional ferroic materials such as ferro-toroidic, ferro-axial, and ferro-chiral materials.

In this presentation, we propose the concept of “multiferroic conversion”, which refers to the transformations of ferroic states by combining different ferroic orders. Such conversion occurs, for example, by a deformation of a structural unit in a ferroic material [1] and by the application of external stimuli such as an electric field to a ferroic material [2-5]. We demonstrate several types of multiferroic conversion by observing unconventional optical phenomena, including electric-field-included Faraday effect (from ferro-magnetic-monopolar to ferro-magnetic state) [2], electrogyration (ferro-axial to ferro-chiral) [3], magneto-chiral dichroism (ferro-axial to ferro-magnetic-toroidal) [4], and electric-field-induced nonreciprocal directional dichroism (altermagnetic to ferro-magnetic-toroidal) [5]. The concept of multiferroic conversion will lead to the unconventional functionalities of various ferroic materials.

[1] T. Nagai et al., J. Am. Chem. Soc. 146, 23348 (2024).[2] T. Hayashida et al., Phys. Rev. Research 4, 043063 (2022).[3] T. Hayashida et al., Nat. Commun. 11, 4582 (2020).[4] T. Hayashida et al., Proc. Natl. Acad. Sci. 120, e2303251120 (2023).[5] T. Hayashida et al., Adv. Mater. 37, 241876 (2025).

Venue

Retreat Meeting 2026
2026-03-23 10:00 - 2026-03-24 17:00 | Kloster Irsee, Klosterring 4, Irsee, 87660, Germany
In March 2026 we are coming together to our 4th and last Retreat Meeting for this funding period. More information will follow in the course of the year.

TRR 360 Seminar:From solitons to correlations: Non-equilibrium spin dynamics across multiple scales Lukas Körber
2026-04-28 16:00 - 17:00 | University of Augsburg, Room S-288 + Zoom
From solitons to correlations: Non-equilibrium spin dynamics across multiple scales

Dr. Lukas Körber
Ultrafast Spectroscopy of Correlated Materials, Radboud University, Nijmegen, Netherlands

Although magnetism fundamentally arises from complex quantum many-body interactions, it is often possible to describe phenomena in ordered materials using classical emergent frameworks at various length and energy scales. This perspective facilitates the analysis of a wide range of static and dynamic nonlinear phenomena, including topological solitons, spin textures, parametric resonance, ultrafast switching, auto-oscillations, and chaos. Typically, each emergent level is achieved by coarse-graining microscopic details, which provides predictive power and introduces new conceptual tools, such as torques, conserved topological charges, and solitons. However, when magnetic systems are driven far from equilibrium, this established hierarchy of emergent descriptions can break down, resulting in fundamentally new multiscale effects that challenge existing conceptual frameworks.

In this talk, I will present three complementary mechanisms that exemplify this breakdown from distinct perspectives. First, driving a topological soliton with high-frequency microwave radiation can push the magnetic system into a far-from-equilibrium state where slow soliton dynamics and fast magnon dynamics become strongly coupled, resulting in self-induced Floquet modes [1]. Second, strong laser excitation of chiral magnets can induce significant thermal fluctuations, resulting in the ultrafast nucleation of solitons known as skyrmions. While the skyrmion number is typically considered conserved at the emergent level, in the ultrafast regime, their collective dynamics can be described by independent thermally activated nucleation and annihilation events [2]. Lastly, at even shorter spatiotemporal scales, perturbing antiferromagnets can drive them into strongly excited states where classical nonlinear magnetism fails, and quantum correlations become significant. Although numerical quantum many-body techniques can capture certain nonlinear spin dynamics, these methods are computationally intensive and often obscure the connection between nonlinear dynamics and their geometric origin in the angular-momentum algebra of spins. To address this challenge, we propose a semiclassical spin-correlation theory that evolves spin correlations on lattice bonds rather than on individual spins [3]. This approach incorporates nonlinear dynamics beyond classical models while preserving the geometric structure associated with the intrinsic nonlinearity of spins.[1] Heins, Körber et al., Science 391, 6781pp. 190-194 (2026), DOI: 10.1126/science.adq9891[2] Lieferink, Körber et al., PRL 136, 146705 (2026), DOI: 10.1103/brnt-2m9l[3] Körber et al. (2025), arXiv:2512.11466

Venue

TRR 360 Sonderseminar: Texture-dependent all-optical magnetization switching in thin ferromagnetic films Dinar Khusyainov
2026-05-11 14:00 - 15:00 | University of Augsburg, Room 242-R
Texture-dependent all-optical magnetization switching in thin ferromagnetic films

Dinar Khusyainov

Radboud University Nijmegen, Netherland

Understanding spin dynamics at ever shorter time and length scales is one of the major challenges in fundamental and applied magnetism. This pursuit has led, in particular, to the discoveries of Giant Magnetoresistance (GMR) and all-optical switching (AOS) of magnetization, while also motivating the development of large-scale facilities such as X-ray free-electron lasers.In this talk, I will present a conceptually novel approach for exploring all-optical switching at the nanoscale by combining tabletop Magnetic Force Microscopy (MFM) with picosecond laser excitation. The potential of this approach is demonstrated through its application to helicity-dependent all-optical switching (HD-AOS) in ferromagnetic Pt/Co/Pt films [1]. I will show how the nanotexture of laser-induced domains modifies the energy landscape, thereby enhancing the interaction between circularly polarized light and spins. As an outlook, I will present recent results from Lorentz transmission electron microscopy studies of laser-induced domains in thin ferromagnetic films, highlighting their topology.

[1] D. Khusyainov et al., Nat. Mater. (2026).

Venue

TRR 360 Seminar:Topology in multi-level systems and braiding of band singularities F. Nur Ünal
2026-05-20 14:15 - 15:15 | Technical University Munich + Zoom
Topology in multi-level systems and braiding of band singularities
Dr. F. Nur Ünal
TCM Group, Cavendish Laboratory, University of Cambridge, United Kingdom

Recent years have witnessed the discovery of novel multi-gap topologies that go beyond all previously-known classifications, arising from intricate non-Abelian braiding procedures. I will talk about non-Abelian charges that can be associated with band singularities in certain multi-level systems and discuss their braiding procedures. I will introduce new non-Abelian topological phases, some of which come with no static counterparts, highlighting new topological invariants required to characterise these phases. The underlying non-Abelian charges can be however quite elusive, and consequently direct measurement of these charges and topological invariants has been challenging. To this end, I will identify observable signatures within reach of state-of-the-art experiments and present concrete protocols with first experimental verifications. Finally, I will go beyond these non-Abelian topological considerations and introduce visually powerful geometric descriptions that arise for multi-level systems (qudits) with more general applications.

arXiv:2511.03894

arXiv:2603.04489

Nat. Comm. 15, 1144 (2024)

Phys. Rev. Lett. 133, 093404 (2024)

Phys. Rev. Research 4, 023120 (2022)

Venue

TRR 360 Seminar:Making sense of band topology in open quantum systems Frank Schindler
2026-06-10 14:15 - 15:15 | Technical University Munich + Zoom
Making sense of band topology in open quantum systems
Dr. Frank Schindler
Imperial College London, United Kingdom

There has been a great deal of work in generalising the notion of band topology to the non-equilibrium setting. Much of this effort has focused on non-Hermitian Hamiltonians that are thought of as describing quantum systems with loss and gain. In the first part of my talk, I will pedagogically explain one of the central results of this field — the winding number and associated skin effect. I will then argue, however, that the non-Hermitian framework is fundamentally inadequate to properly describe quantum many-body systems — even non-interacting ones — calling into question the physical relevance of non-Hermitian topological invariants. I will end my talk by working out to what extent such invariants, in particular the winding number, can be saved in the more general Lindblad description of open quantum systems.

Venue

TRR 360 Seminar:Active Magnets Achim Rosch
2026-06-17 14:15 - 15:15 | Technical University Munich + Zoom
Active Magnets
Prof. Dr. Achim Rosch
Institute for Theoretical Physics, University of Cologne

Active matter encompasses many-particle systems composed of self-propelled units, such as flocks of birds or schools of fish. We ask whether similar physics can emerge in condensed-matter systems driven out of equilibrium, for example by radiation. Focusing on magnetic systems with Goldstone-like modes that can be activated by weak external stimuli, we study a ferrimagnet subject to a weak oscillating field. In our model, domain walls acquire active motion in a direction selected by spontaneous symmetry breaking. This leads to qualitatively new dynamics: long-range order develops with remarkable efficiency and is highly robust against noise. We show that these properties originate from a novel form of dynamical frustration induced by the dynamics of Goldstone modes.

Venue

TRR 360 Seminar:Chiral phononics: A new approach to angular momentum in solidsDominik M. Juraschek
2026-06-30 16:00 - 17:00 | University of Augsburg, Room S-288 + Zoom
Chiral phononics: A new approach to angular momentum in solids

Prof. Dr. Dominik M. Juraschek
Eindhoven University of Technology, Netherlands

Chiral phononics is an emerging field that utilizes the angular momentum of circularly polarized lattice vibrations to manipulate the properties of materials. Intriguing discoveries of novel phenomena have included phononic analogues of spintronic and orbitronic effects, as well as the generation of atomistic tesla-scale magnetic fields that promise unprecedented control of magnetic order. In this talk, I will introduce general directions in the field and then present our recent predictions of novel physical mechanisms. Specifically, I will present a theory for the phonon angular momentum Hall effect that induces a transverse angular-momentum current and accumulation, resembling a phononic analogue of the spin and orbital Hall effects for electrons. I will further show how chiral-phonon scattering leads to a rotational analogue of the Umklapp process in solids, demonstrating the conservation of crystal angular momentum.

Venue

TRR 360 Sonderseminar: Magnetization Measurements and Cyclotron Mass-Selective dHvA Effect under Temperature Modulation Michelle Hollricher
2026-07-06 15:30 - 16:30 | University of Augsburg, Room S-254
Magnetization Measurements and Cyclotron Mass-Selective dHvA Effect under Temperature Modulation

M.Sc. Michelle Hollricher

Lehrstuhl für Topologie korrelierter Systeme (E51)

Zentrum für QuantumEngineering (ZQE)

Technische Universität München

Venue

TRR 360 Seminar:Intertwined Orders in Correlated Quantum Matter: New Perspectives from Numerically Exact Simulations Tom Devereaux
2026-07-08 14:15 - 15:15 | Technical University Munich + Zoom
Intertwined Orders in Correlated Quantum Matter: New Perspectives from Numerically Exact Simulations
Prof. Dr. Tom P. Devereaux
Stanford University, Stanford, USA

Strong electronic interactions often produce multiple competing ordered states whose energies differ by only tiny amounts, making theoretical predictions exceptionally challenging. In this talk I will describe how recent advances in unbiased numerical techniques are providing new insight into this problem using the Hubbard and Emery models as paradigmatic examples. Large-scale DMRG calculations reveal robust stripe ordering over broad regions of the phase diagram, while finite-temperature DQMC identifies low-energy superconducting fluctuations through a new imaginary-time diagnostic that overcomes many traditional limitations imposed by the fermion sign problem. Extending these studies to the multiorbital Emery model demonstrates how oxygen degrees of freedom naturally generate intertwined charge stripes and nematicity beyond the single-band description. These results point toward a unified picture in which superconductivity, charge order, spin order, and nematicity emerge from a landscape of nearly degenerate correlated states whose competition determines the observable properties of quantum materials.

Venue

TRR 360 Seminar:Topological Spin-Orbitronics and Orbitronics for GreenITMathias Kläui
2026-07-14 16:00 - 17:00 | University of Augsburg, Room S-288 + Zoom
Topological Spin-Orbitronics and Orbitronics for GreenIT

Prof. Dr. Mathias Kläui

Institute of Physics, University of Mainz
Centre for Quantum Spintronics, Norwegian University of Science and Technology, Trondheim, Norway

Novel spintronic devices can play a role in the quest for GreenIT if they are stable and can transport and manipulate spin with low power. Devices have been proposed, where switching by energy-efficient approaches is used to manipulate topological spin structures [1].
We combine ultimate stability of topological states due to chiral interactions [1] with ultra-efficient manipulation using novel spin torques [2]. In particular orbital torques increase the switching efficiency by more than a factor 10. Recently we have demonstrated that using correlated orbital magnets, a factor 70 stronger interaction with orbital currents is found boding well for ultra-efficient manipulation [3].
We use skyrmion dynamics for non-conventional stochastic computing applications, where we developed skyrmion reshuffler devices based on skyrmion diffusion, which also reveals the origin of skyrmion pinning. Such diffusion can furthermore be used for Token-based Brownian Computing and Reservoir Computing [4].

References:
1. K. Everschor-Sitte et al., J. Appl. Phys. 124, 240901 (2018)
2. S. Fukami et al., Nature Phys. (2025) ; https://doi.org/10.1038/s41567-025-03143-w
3. C. Schmitt et al., Science 393, 76 (2026)
4. G. Beneke et al., Nature Commun. 15, 8103 (2024)

Venue

TRR 360 Seminar:Emergent phenomena in nanosculpted quantum material devicesMaximilian Birch
2026-07-21 16:00 - 17:00 | University of Augsburg, Room S-288 + Zoom
Emergent phenomena in nanosculpted quantum material devices

Dr. Maximilian Birch
RIKEN Center for Emergent Matter Science, Japan

Focused ion beam (FIB) techniques enable precisely tailored nanoscale devices to be fabricated directly from high-quality single crystals, providing a powerful platform for exploring emergent transport phenomena and unconventional experimental geometries. In this talk, I will discuss the development and application of FIB-based device fabrication approaches used to investigate a range of quantum materials and functionalities, including skyrmion dynamics, p-wave magnetism, and time-reversal symmetry breaking antiferromagnets. I will then present our recent development of three-dimensional nanosculpted FIB devices, focusing on helical structures fabricated from the high-mobility Weyl ferromagnet Co₃Sn₂S₂. By introducing inversion symmetry breaking on the length scale of the electron mean free path, these structures exhibit large nonreciprocal transport effects, resulting in a switchable zero-field diode response. More broadly, these results demonstrate how nanoscale geometric design can be used to access emergent electronic functionality in quantum materials.

Venue

Summer School 2026
2026-09-21 12:00 - 2026-09-24 17:00 | Haus der bayerischen Landwirtschaft, Rieder Str. 70, Herrsching am Ammersee, 82211, Germany
This year, the TRR360 young researchers are back in Herrsching am Ammersee. We will hold a Summer School with the topic of “Order and Disorder in Quantum Materials”. Many interesting lectures as well as a workhop in “Scientific Writing” are waiting for you.

Register on our website to secure your spot. See you in Herrsching!

TRR 360 Seminar:tba Ady Stern
2026-10-28 15:00 - 16:00 | Technical University Munich + Zoom
tba
Prof. Dr. Ady Stern
Condensed Matter Physics, Weizmann Institute, Rehovot, Israel

Venue

TRR 360 Seminar:tbaLudovic Jaubert
2026-11-03 16:00 - 17:00 | University of Augsburg, Room S-288 + Zoom
tba

Prof. Dr. Ludovic Jaubert
Laboratoire Ondes et Matière d’AquitaineUniversity of Bordeaux, France

Venue

Young Researchers Forum 2026
2026-11-10 10:00 - 2026-11-11 16:00 | University of Augsburg, Universitätsstr. 2, Augsburg, 86159
The circle closes when we meet again in Augsburg for the last YR Forum of the first funding period. For most of us, our journey together in the MGK has started in Augsburg three years ago.

As tradition dictates, there will be a Focus Lecture, but there will also be a meeting with a start-up founder from our physics institute, a workshop about “AI in science” and, of course, a lot of networking and fun. Addtionally, interested people can come with us to visit DELO, hidden champions in high-tech adhesives close to Landsberg. They are very eager to meet young motivated physicists. We are looking forward to see all of you in Augsburg!

For more information check our website: https://www.trr360.de/mgk/yr-forum-2026/ !

On-site Evaluation
2027-02-04 09:00 - 2027-02-05 15:00 | Technical University Munich
The TRR360 wants to go in the second round! On 4-5 February, our proposal for the next 4-year period will be evaluated at the Technical University of Munich. More details will follow later. Here, you can find a rough plan what is going to happen on these days:

First day 4.2.2027

Each project will give a presentation in the morning and present a poster in the afternoon about their achievements in the first phase and their future plans. In this part, all members of the TRR360 need to be on site.

Second day 5.2.2027

The Steering Committe and, possibly, chosen PIs have anwer the assessors.

Venue

YR Workshop 2027
2027-05-24 12:00 - 2027-05-26 17:00 | CUSANUS Academie, Seminarplatz 2, Brixen, 39042, Italy
For the last event of the first funding period, we have decided to visit the beautiful town Brixen in South Tyrol. Here, we can have workshops, talks, trainings and, mostly, a lot of time together for exchange, discussions and networking. If you have a good idea what you would like to do, let Ina and Gloria know.
