TRR 360 Seminar:Chiral phononics: A new approach to angular momentum in solidsDominik M. Juraschek
2026-06-30 16:00 - 17:00 (Europe/Berlin) | 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 Seminar:tba Tom Devereaux
2026-07-08 14:15 - 15:15 | Technical University Munich + Zoom
tba
Prof. Dr. Tom P. Devereaux
Stanford University, Stanford, USA

Venue

TRR 360 Seminar:tbdMathias Kläui
2026-07-14 16:00 - 17:00 | University of Augsburg, Room S-288 + Zoom
tbd

Prof. Dr. Mathias Kläui
Institute of Physics, University of Mainz

tbd

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
