Geometric dephasing of holes in two-dimensional nanostructures

TL;DR

This paper investigates how geometric spin dephasing affects light and heavy holes in 2D nanostructures, revealing that light holes experience dephasing linked to momentum relaxation, unlike heavy holes.

Contribution

It establishes a direct relation between geometric spin dephasing rate and crystal momentum relaxation for light holes, highlighting a fundamental difference from heavy holes.

Findings

Light holes exhibit geometric spin dephasing proportional to momentum relaxation.

Heavy holes are largely unaffected by geometric dephasing in the studied conditions.

Dephasing rates are zero for heavy holes, indicating robustness against this process.

Abstract

We will show that in zero magnetic field the rate of the geometric spin dephasing of a light hole in two-dimensional nanostructures is equal to the rate of the one-dimensional orientational relaxation of its crystal momentum. In contrast, this process is singularly ineffective for heavy holes.