Detecting Chiral Magnetic Effect by Lattice Dynamics

TL;DR

This paper proposes a novel optical measurement method to detect the chiral magnetic effect by coupling Weyl point-induced plasmon oscillations with specific phonon modes, revealing magnetic field effects.

Contribution

It introduces a new approach to observe the chiral magnetic effect through phonon-plasmon resonance in optical responses, leveraging lattice dynamics.

Findings

Resonance between plasmon oscillations and phonon modes modifies optical response.

External magnetic field influences phonon behavior via the chiral magnetic effect.

Proposes optical detection as a practical method for studying Weyl semimetals.

Abstract

In the present paper, we propose that the chiral magnetic effect, the direct consequence of the presence of Weyl points in the band structure, can be detected by its coupling to certain phonon modes, which behave like pseudo scalars under point group transformations. Such coupling can generate resonance between intrinsic plasmon oscillation and the corresponding phonon modes, leading to dramatic modification of the optical response by the external magnetic field, which provides a new way to study chiral magnetic effect by optical measurements.