# Observation of Spin-Orbit Berry's Phase in Magnetoresistance of a Two-Dimensional Hole Anti-dot System

## TL;DR

This paper reports the experimental observation of spin-orbit Berry's phase in magnetoresistance oscillations of a two-dimensional hole anti-dot system, revealing the influence of spin-orbit interaction on quantum interference effects.

## Contribution

It provides the first experimental evidence of spin-orbit Berry's phase in a 2D hole system's magnetoresistance, supported by simulation.

## Key findings

- Observation of superposed Aharonov-Bohm oscillations on commensurability peaks
- Splitting of Fourier transform peaks due to Berry's phase variation
- Qualitative agreement between experiment and simulation considering Berry's phase

## Abstract

We report observation of spin-orbit Berry's phase in the Aharonov-Bohm (AB) type oscillation of weak field magnetoresistance in an anti-dot lattice (ADL) of a two-dimensional hole system. An AB-type oscillation is superposed on the commensurability peak, and the main peak in the Fourier transform is clearly split up due to variation in Berry's phase originating from the spin-orbit interaction. A simulation considering Berry's phase and the phase arising from the spin-orbit shift in the momentum space shows qualitative agreement with the experiment.