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  • Title: Detection and Control of Spin-Orbit Interactions in a GaAs Hole Quantum Point Contact.
    Author: Srinivasan A, Miserev DS, Hudson KL, Klochan O, Muraki K, Hirayama Y, Reuter D, Wieck AD, Sushkov OP, Hamilton AR.
    Journal: Phys Rev Lett; 2017 Apr 07; 118(14):146801. PubMed ID: 28430471.
    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.
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