Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session A68: Optical response of topological semimetals
8:00 AM–10:48 AM,
Monday, March 14, 2022
Room: Hyatt Regency Hotel -Hyde Park B
Sponsoring Unit: DMP
Chair: Ken Burch, Boston College
Abstract: A68.00004 : Magneto-optical response of chiral fermions.*
9:00 AM–9:36 AM
In Dirac and Weyl materials, we predict that the chiral anomaly results in generation of chiral charge in response to circularly polarized light. This causes an anomalous photocurrent in the direction of an applied DC magnetic field.
In Weyl materials with a reflection plane, such as TaAs, the tilt of the cones causes an anisotropic interaction with magnetic field, and we predict a photocurrent perpendicular to an external field in response to linearly polarized light.
In materials with chiral crystal structure and multifold fermions, such as CoSi, if the Fermi level is not exactly at the Weyl node, we predict a photocurrent parallel to an external magnetic field, in response to linearly polarized light.
*This work was supported in part by the US Department of Energy under Awards DE-SC-0017662 and DE-FG- 88ER40388. I also acknowledge the support of an OPVR Seed Grant from Stony Brook University.
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