Black hole mirages: electron lensing and Berry curvature effects in inhomogeneously tilted Weyl semimetals

HALLER, Andreas; Hegde, Suraj; Xu, Chen; DE BEULE, Christophe; SCHMIDT, Thomas; Meng, Tobias

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Black hole mirages: electron lensing and Berry curvature effects in inhomogeneously tilted Weyl semimetals

HALLER, Andreas; Hegde, Suraj; Xu, Chen et al.

2023 • In SciPost Physics, 14, p. 119

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Abstract :

[en] We study electronic transport in Weyl semimetals with spatially varying nodal tilt profiles. We find that the flow of electrons can be guided precisely by judiciously chosen tilt profiles. In a wide regime of parameters, we show that electron flow is described well by semiclassical equations of motion similar to the ones governing gravitational attraction. This analogy provides a physically transparent tool for designing tiltronic devices, such as electronic lenses. The analogy to gravity circumvents the notoriously difficult full-fledged description of inhomogeneous solids, but a comparison to microscopic lattice simulations shows that it is only valid for trajectories sufficiently far from analogue black holes. We finally comment on the Berry curvature-driven transverse motion, and relate the latter to spin precession physics.

Disciplines :

Physics

Author, co-author :

HALLER, Andreas ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)

Hegde, Suraj; Technische Universität Dresden > Institute of Theoretical Physics

Xu, Chen; Technische Universität Dresden > Institute of Theoretical Physics

DE BEULE, Christophe ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) ; University of Pennsylvania - Penn > Department of Physics and Astronomy

SCHMIDT, Thomas ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)

Meng, Tobias; Technische Universität Dresden > Institute of Theoretical Physics

External co-authors :

yes

Language :

English

Title :

Black hole mirages: electron lensing and Berry curvature effects in inhomogeneously tilted Weyl semimetals

Publication date :

17 May 2023

Journal title :

SciPost Physics

eISSN :

2542-4653

Publisher :

SciPost Foundation, Amsterdam, Netherlands

Volume :

Pages :

119

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://arxiv.org/abs/2210.16254

FnR Project :

FNR14764976 - Topology In Relativistic Semimetals, 2020 (01/08/2021-31/07/2024) - Thomas Schmidt

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