Observing magnetoanisotropic weak antilocalization in near-surface quantum wells

We investigate the effects of an in-plane magnetic field on the weak antilocalization signature of near-surface quantum wells lacking bulk and inversion symmetry. The measured magnetoconductivity, which is conductivity as a function of the out-of-plane magnetic field, exhibits a strong anisotropy wi...

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Bibliographic Details
Published in:Physical review research 2024-01, Vol.6 (1), p.013039, Article 013039
Main Authors: Farzaneh, S. M., Hatefipour, Mehdi, Schiela, William F., Lotfizadeh, Neda, Yu, Peng, Elfeky, Bassel Heiba, Strickland, William M., Matos-Abiague, Alex, Shabani, Javad
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Language:English
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Summary:We investigate the effects of an in-plane magnetic field on the weak antilocalization signature of near-surface quantum wells lacking bulk and inversion symmetry. The measured magnetoconductivity, which is conductivity as a function of the out-of-plane magnetic field, exhibits a strong anisotropy with respect to the direction of the in-plane magnetic field. The twofold symmetry of the observed magnetoanisotropy originates from the competition between Rashba and Dresselhaus spin-orbit couplings. The high sensitivity of the weak antilocalization to the spin texture produced by the combined Zeeman and spin-orbit fields results in very large anisotropy ratios, reaching 100%. Using a semiclassical universal model in quantitative agreement with the experimental data, we uniquely determine the values of the Dresselhaus and Rashba parameters as well as the effective in-plane g-factor of the electrons. Understanding these parameters provides prospects for different applications ranging from spintronics to topological quantum computing.
ISSN:2643-1564
2643-1564
DOI:10.1103/PhysRevResearch.6.013039