Magneto-anisotropic weak antilocalization in near-surface quantum wells
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2022
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| _version_ | 1866929304244322304 |
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| author | Farzaneh, S. M. Hatefipour, Mehdi Schiela, William F. Lotfizadeh, Neda Yu, Peng Elfeky, Bassel Heiba Strickland, William M. Matos-Abiague, Alex Shabani, Javad |
| author_facet | Farzaneh, S. M. Hatefipour, Mehdi Schiela, William F. Lotfizadeh, Neda Yu, Peng Elfeky, Bassel Heiba Strickland, William M. Matos-Abiague, Alex Shabani, Javad |
| contents | 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 exhibits a strong anisotropy with respect to the direction of the in-plane magnetic field. The two-fold symmetry of the observed magneto-anisotropy 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 new prospects for novel applications ranging from spintronics to topological quantum computing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2208_06050 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Magneto-anisotropic weak antilocalization in near-surface quantum wells Farzaneh, S. M. Hatefipour, Mehdi Schiela, William F. Lotfizadeh, Neda Yu, Peng Elfeky, Bassel Heiba Strickland, William M. Matos-Abiague, Alex Shabani, Javad Mesoscale and Nanoscale Physics Materials Science Other Condensed Matter 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 exhibits a strong anisotropy with respect to the direction of the in-plane magnetic field. The two-fold symmetry of the observed magneto-anisotropy 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 new prospects for novel applications ranging from spintronics to topological quantum computing. |
| title | Magneto-anisotropic weak antilocalization in near-surface quantum wells |
| topic | Mesoscale and Nanoscale Physics Materials Science Other Condensed Matter |
| url | https://arxiv.org/abs/2208.06050 |