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

Date

Jan 17, 2023

Time

11:00 AM - 12:00 PM

Speaker

Dr. Suraj Hegde

Affiliation

TU Dresden, Theoretical Solid State Physics

Language

en

Main Topic

Materialien

Host

Grit Rötzer

Description

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 equations for geodesics on curved spacetimes . This analogy provides a physically transparent tool for designing tilt-tronic 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. .

Links

• Seminars at the IFW

Last modified: Jan 17, 2023, 7:39:17 AM