Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session P41: Spins in Non-magnetic Semiconductors
2:30 PM–5:18 PM,
Wednesday, March 4, 2020
Room: 707
Sponsoring
Units:
GMAG DMP FIAP DCOMP
Chair: Raphael Daveau, Cornell University
Abstract: P41.00005 : Probing the cubic crystal anisotropy and spin-orbit interaction in GaAs heterostructures using hole quantum point contacts
Presenter:
Karina Hudson
(Univ of New South Wales)
Authors:
Karina Hudson
(Univ of New South Wales)
Ashwin Srinivasan
(Univ of New South Wales)
Dmitry Miserev
(Department of Physics, University of Basel)
Qingwen WANG
(Univ of New South Wales)
Oleh Klochan
(Univ of New South Wales)
Ian Farrer
(Department of Electronic and Electrical Engineering, University of Sheffield)
David A Ritchie
(Cavendish Laboratory, University of Cambridge)
Alex Hamilton
(Univ of New South Wales)
Here we present the first study of the effect of cubic crystal anistropies on the anisotropy of the g-factor. By rotating the QPC with respect to the crystal axes, we change the effect of the cubic crystal terms. We find the anisotropy of the g-factor is strongly dependent on QPC orientation, and present a theoretical framework describing the SOI terms arising from cubic crystal anisotropy. We identify four additional Zeeman terms that describe the dependence of the anisotropy of the in-plane g-factors with respect to QPC orientation. Our model shows that SOI is highly dependent on crystal asymmetries with implications for topological systems such as artificial graphene.
1Miserev et al., Phys. Rev. Lett. 119 116803 (2017)
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