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Proceedings Paper

Anomalous optical properties of Rashba conductor (Conference Presentation)
Author(s): Gen Tatara

Paper Abstract

We theoretically explore the optical properties of a bulk Rashba conductor by calculating the transport coefficients at finite frequencies. It is demonstrated that the combination of direct and inverse Edelstein effects leads to a softening of the plasma frequency for the electric field perpendicular to the Rashba field, resulting in a hyperbolic electromagnetic metamaterial. In the presence of magnetization, a significant enhancement of anisotropic propagation (directional dichroism) is predicted because of the interband transition edge singularity. On the basis of an effective Hamiltonian analysis, the dichroism is demonstrated to be driven by toroidal and quadratic moments of the magnetic Rashba system. The effective theory of the cross-correlation effects has the same mathematical structure as that of insulating multiferroics.

Paper Details

Date Published: 21 September 2017
Proc. SPIE 10357, Spintronics X, 103571R (21 September 2017); doi: 10.1117/12.2277502
Show Author Affiliations
Gen Tatara, RIKEN Ctr. for Emergent Matter Science (Japan)

Published in SPIE Proceedings Vol. 10357:
Spintronics X
Henri-Jean Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi; Henri Jaffrès, Editor(s)

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