Phonon Edelstein 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.

Figures (2)

• Figure 1: Schematic diagram of the model. The application of an electric field to a chiral metal with chiral phonons can induce phonon angular momentum.
• Figure 2: The diagrammatic representations of the phonon Green's function to first orders in ${H_{ep}}$ and ${H_A}$. Two parallel solid, solid and dotted lines represent phonon Green's function, electron Green's function, and ${H_A}$, respectively. Two parallel solid and solid lines intersect via ${H_{ep}}$.