Detection and Control of Spin-Orbit Interactions in a GaAs Hole Quantum Point Contact

A. Srinivasan, D. S. Miserev, K. L. Hudson, O. Klochan, K. Muraki, Y. Hirayama, D. Reuter, A. D. Wieck, O. P. Sushkov, A. R. Hamilton

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

We investigate the relationship between the Zeeman interaction and the inversion-asymmetry-induced spin-orbit interactions (Rashba and Dresselhaus SOIs) in GaAs hole quantum point contacts. The presence of a strong SOI results in the crossing and anticrossing of adjacent spin-split hole subbands in a magnetic field. We demonstrate theoretically and experimentally that the anticrossing energy gap depends on the interplay between the SOI terms and the highly anisotropic hole g tensor and that this interplay can be tuned by selecting the crystal axis along which the current and magnetic field are aligned. Our results constitute the independent detection and control of the Dresselhaus and Rashba SOIs in hole systems, which could be of importance for spintronics and quantum information applications.

Original languageEnglish
Article number146801
JournalPhysical review letters
Volume118
Issue number14
DOIs
Publication statusPublished - 2017 Apr 5

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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