Work

Anomalous skew scattering of plasmons in a Dirac electron fluid

Year: 2025

Type: article

Abstract: The Berry phase-related nontrivial electronic band geometries can significantly influence bulk and edge plasmons, resulting in their nonreciprocal propagation and opening unique opportunities for plasmonics. In the present paper, we extend the hydrodynamic framework to describe the scattering of plasmons in a Dirac electron fluid off a circular region with an induced nonzero anomalous Hall response, i.e., a Berry flux target. We demonstrate that the scattering has a giant asymmetry or skewness and exhibits a series of resonances. The latter appears due to a chiral nontopological trapped mode circulating the target. We discuss possible experimental realizations, including the surface of a topological insulator film and graphene irradiated by the circularly polarized beam.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.111.165404

Authors: Cooper Finnigan, Dmitry K. Efimkin

Institutions: Monash University, ARC Centre of Excellence in Future Low-Energy Electronics Technologies

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: green

Funder: Centre of Excellence in Future Low-Energy Electronics Technologies, Australian Research Council

Award: G2659024479