SKM 2023 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 16: Poster: Transport

TT 16.8: Poster

Monday, March 27, 2023, 15:00–18:00, P2/OG4

Weak localization in semiconductor heterostructures with strong spin orbit interaction — •Simon Feyrer, Jaydean Schmidt, Michael Prager, Dominique Bougeard, and Christoph Strunk — Institute of Experimental and Applied Physics, University of Regensburg, Germany

We present measurements of weak localization (WL) and weak anti-localization (WAL) performed on quasi-1D wires patterned into an InAs based quantum well. Due to the confinement of the electrons along the wires, the D’yakonov-Perel spin relaxation is expected to be suppressed resulting in WL instead of WAL. As consequence of the spin orbit interaction anisotropy, the amplitude of the WL is sensitive to the direction of an applied in-plane magnetic field and provides an estimate of the ratio between the Rashba and Dresselhaus spin orbit coefficient [1,2].
By fitting the measured WAL and WL-curves, the highest spin relaxation rate was extracted for the wires orientated along the [011] crystal axis. A clear suppression of spin relaxation was observed along the [001] wire direction.

[1] T. Nishimura et al., Phys. Rev. B 103, 094412 (2021)

[2] A. Sasaki et al., Nat. Nanotechnol. 9, 703 (2014)