SKM 2023 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 6: Topological Semimetals

TT 6.11: Vortrag

Montag, 27. März 2023, 12:15–12:30, HSZ 304

Anisotropic optics and gravitational lensing of tilted Weyl fermions — •Viktor Könye¹, Lotte Mertens^1,2, Corentin Morice³, Dmitry Chernyavsky¹, Ali G. Moghaddam^4,5, Jasper van Wezel², and Jeroen van den Brink^1,6 — ¹Institute for Theoretical Solid State Physics, IFW Dresden and Wurzburg-Dresden Cluster of Excellence ct.qmat, Helmholtzstr. 20, 01069 Dresden, Germany — ²Institute for Theoretical Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands — ³Laboratoire de Physique des Solides, CNRS UMR 8502, Universite Paris-Saclay, F-91405 Orsay Cedex, France — ⁴Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran — ⁵Computational Physics Laboratory, Physics Unit, Faculty of Engineering and Natural Sciences, Tampere University, FI-33014 Tampere, Finland — ⁶Institute for Theoretical Physics, TU Dresden, 01069 Dresden, Germany

We show that tilted Weyl semimetals with a spatially varying tilt provide a platform for studying analogues to problems in anisotropic optics as well as curved spacetime. Considering particular tilting profiles, we numerically evaluate the time evolution of wave packets. We demonstrate that electron trajectories in such systems can be obtained from Fermat's principle in the presence of an inhomogeneous, anisotropic effective refractive index. On the other hand, we show how the electrons dynamics reveal gravitational features and use them to simulate gravitational lensing around a synthetic black hole.