Phonon Edelstein effect in chiral metals

TL;DR

This paper introduces the phonon Edelstein effect, a mechanism where electric current induces phonon angular momentum in chiral metals with spin-orbit coupling, supported by analytical expressions and physical interpretation.

Contribution

It presents the first theoretical proposal and analytical formulation of the phonon Edelstein effect in three-dimensional chiral metals with spin-orbit coupling.

Findings

Analytical expression for current-induced phonon angular momentum

Physical interpretation of the phonon Edelstein effect

Estimated magnitude of the effect in chiral metals

Abstract

We propose a mechanism of current-induced phonon angular momentum, which we call phonon Edelstein effect. We investigate this effect in three-dimensional chiral metals with spin-orbit coupling and chiral phonons, and obtain an analytical expression of phonon angular momentum induced by the current. We also discuss the physical interpretation of this effect and give an estimation of its magnitude.