SKM 2023 – wissenschaftliches Programm
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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 Beule1,3, 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.