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

Datum

17.01.2023

Zeit

11:00 - 12:00

Sprecher

Dr. Suraj Hegde

Zugehörigkeit

TU Dresden, Theoretical Solid State Physics

Sprache

en

Hauptthema

Materialien

Host

Grit Rötzer

Beschreibung

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

Letztmalig verändert: 17.01.2023, 07:39:17