Chiral magnetic plasmons in anomalous relativistic matter

TL;DR

This paper investigates the unique behaviors of chiral magnetic and pseudomagnetic plasmons in relativistic matter under magnetic fields using chiral kinetic theory, revealing experimental signatures and novel effects.

Contribution

It provides a detailed analysis of chiral plasmon modes in relativistic matter with magnetic and pseudomagnetic fields, highlighting new anomalous features and effects of chemical potential.

Findings

Magnetic and pseudomagnetic fields modify plasmon frequencies and their dependence on wave vector.

Chiral chemical potential causes plasmon energy splitting even without external fields.

Chiral shift parameter influences plasmon behavior in Weyl materials.

Abstract

The chiral plasmon modes of relativistic matter in background magnetic and strain-induced pseudomagnetic fields are studied in detail using the consistent chiral kinetic theory. The results reveal a number of anomalous features of these chiral magnetic and pseudomagnetic plasmons that could be used to identify them in experiment. In a system with nonzero electric (chiral) chemical potential, the background magnetic (pseudomagnetic) fields not only modify the values of the plasmon frequencies in the long-wavelength limit, but also affect the qualitative dependence on the wave vector. Similar modifications can be also induced by the chiral shift parameter in Weyl materials. Interestingly, even in the absence of the chiral shift and external fields, the chiral chemical potential alone leads to a splitting of plasmon energies at linear order in the wave vector.