Renormalization of spin-rotation coupling

TL;DR

This paper predicts that interband mixing enhances spin-rotation coupling, affecting electron spin resonance and mechanical torque, with explicit calculations using the eight-band Kane model.

Contribution

It introduces a method to explicitly calculate the renormalized spin-rotation coupling considering interband mixing effects.

Findings

Spin-rotation coupling is significantly enhanced by interband mixing.

Rotational Doppler shift in electron spin resonance is strongly modulated.

Mechanical torque on electron spins is affected by the renormalization.

Abstract

We predict the enhancement of the spin-rotation coupling due to the interband mixing. The Bloch wavefunctions in the presence of mechanical rotation are constructed with the generalized crystal momentum which includes a gauge potential arising from the rotation. Using the eight- band Kane model, the renormalized spin-rotation coupling is explicitly obtained. As a result of the renormalization, the rotational Doppler shift in electron spin resonance and the mechanical torque on an electron spin will be strongly modulated.