Dependence of spin dynamics on in-plane magnetic field in AlGaN/GaN quantum wells

From National Research Council Canada

DOIResolve DOI: https://doi.org/10.1209/0295-5075/112/67003
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Name affiliation
  1. National Research Council Canada. Measurement Science and Standards
FormatText
TypeArticle
Journal titleEPL (Europhysics Letters)
ISSN0295-5075
1286-4854
Volume112
Issue6
Pages67003–
SubjectPACS: 71.70.Ej – Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect / 73.63.Hs – Quantum wells / 75.76.+j – Spin transport effects
Abstract
We systematically investigate the weak antilocalization effect and the dependence of spin dynamics on the in-plane magnetic field for two AlₓGa₁₋ₓN/GaN quantum wells, in which these effects are dominated by the spin-orbit interaction originating from the structural inversion asymmetry and the bulk inversion asymmetry, respectively. By fitting the weak antilocalization magnetoconductance, the phase coherence time and spin-orbit scattering time are obtained. With the increase of in-plane magnetic fields, the phase coherence time decreases quadratically while the spin-orbit scattering time increases quadratically. We attribute these variations to the competition between the Zeeman splitting and the spin-orbit interaction. The comparison between systems dominated by structural inversion asymmetry and bulk inversion asymmetry in the in-plane magnetic field is also made. Our findings may provide clues to control the weak antilocalization effect and spin-orbit interaction via the in-plane field.
Publication date
LanguageEnglish
Peer reviewedYes
NPARC number21277233
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