Anomalous k-dependent spin splitting in wurtzite AlxGa1-xN/GaN heterostructures

TL;DR

This paper confirms the presence of k-dependent spin splitting in wurtzite AlxGa1-xN/GaN heterostructures, revealing an anomalous beating pattern caused by Rashba and Dresselhaus interactions, with Dresselhaus dominating at high k values.

Contribution

It demonstrates the anomalous beating pattern in spin splitting due to interference of spin-orbit interactions in wurtzite heterostructures, highlighting the role of band coupling effects.

Findings

Confirmation of k-dependent spin splitting in heterostructures

Observation of anomalous beating pattern in measurements

Identification of Dresselhaus as the dominant mechanism at high k

Abstract

We have confirmed the k-dependent spin splitting in wurtzite AlxGa1-xN/GaN heterostructures. Anomalous beating pattern in Shubnikov-de Haas measurements arises from the interference of Rashba and Dresselhaus spin-orbit interactions. The dominant mechanism for the k-dependent spin splitting at high values of k is attributed to Dresselhaus term which is enhanced by the Delta C1-Delta C3 coupling of wurtzite band folding effect.