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TT: Fachverband Tiefe Temperaturen

TT 6: Topological Semimetals

TT 6.12: Vortrag

Montag, 27. März 2023, 12:30–12:45, HSZ 304

Black hole mirages: Electron lensing and Berry curvature effects in inhomogeneously tilted Weyl semimetals — •Andreas Haller¹, Suraj Hedge², Chen Xu², Christophe De Beule^1,3, Thomas L. Schmidt¹, and Tobias Meng² — ¹Department of Physics and Materials Science, University of Luxembourg, L-1511 Luxembourg, Luxembourg — ²Institute of Theoretical Physics and Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01069 Dresden, Germany — ³Department of Physics and Astronomy, University of Pennsylvania, Philadelphia PA 19104, USA

In this talk, I present our recent study about electronic transport in Weyl semimetals with spatially varying nodal tilt profiles. We discuss two complementary approaches that characterise the electron flow: solutions of the semiclassical equations of motion, in analogy to those encountered in black hole spacetimes, and large-scale microscopic simulations of a scattering region surrounded by semi-infinite leads. We show that the two approaches lead to equivalent results when the wave packet is sufficiently far from the center of the tilt. The two methods are arguably a powerful toolset in the pursuit of tiltronic devices such as e.g. electronic lenses.