Anisotropy of spin splitting and spin relaxation in lateral quantum dots

Vladimir I. Fal'ko, B. L. Altshuler, O. Tsyplyatyev

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    Abstract

    Inelastic spin relaxation and spin splitting εs in lateral quantum dots are studied in the regime of strong in-plane magnetic field. Because of both the g-factor energy dependence and spin-orbit coupling, εs demonstrates a substantial nonlinear magnetic field dependence similar to that observed by Hanson et al. [Phys. Rev. Lett. 91, 196802 (2003)PRLTAO0031-900710. 1103/PhysRevLett.91.196802]. It also varies with the in-plane orientation of the magnetic field due to crystalline anisotropy of the spin-orbit coupling. The spin relaxation rate is also anisotropic, the anisotropy increasing with the field. When the magnetic length is less than the "thickness" of the GaAs dot, the relaxation can be an order of magnitude faster for B [100] than for B [110].

    Original languageEnglish
    Article number076603
    JournalPhysical Review Letters
    Volume95
    Issue number7
    DOIs
    Publication statusPublished - 12 Aug 2005

    Research Beacons, Institutes and Platforms

    • National Graphene Institute

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