Abstract
We report on the results of experiments indicating the existence of spin glass in beryllium-doped GaAs–AlGaAs quantum wells with a virtual Anderson transition. We have observed experimentally a slow relaxation of resistance after the application of a magnetic field and the magnetization curve hysteresis. The formation of spin glass is associated with indirect exchange of spins of localized holes via delocalized states in the region of the virtual Anderson transition. It is shown that an isotropic negative magnetoresistance observed in these structures can also be associated with spin glass properties.
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Funding
This study was supported by the Russian Foundation for Basic Research (project no. 19-02-00184). The theoretical part of this work was supported by the Foundation of Development of Theoretical Physics and Mathematics “BASIS.”
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Translated by N. Wadhwa
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Shumilin, A.V., Kozub, V.I., Agrinskaya, N.V. et al. Spin Glass and Isotropic Negative Magnetoresistance in GaAs–AlGaAs Quantum Wells with a Virtual Anderson Transition. J. Exp. Theor. Phys. 132, 810–817 (2021). https://doi.org/10.1134/S1063776121050071
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DOI: https://doi.org/10.1134/S1063776121050071