Anisotropic spin relaxation in quantum dots

Abstract

We study theoretically phonon-assisted spin relaxation of an electron confined in an elliptical quantum dot (QD) subjected to a tilted magnetic field. In the presence of both Rashba and Dresselhaus spin-orbit terms, the relaxation rate is anisotropic with respect to the in-plane field orientation. This anisotropy originates from the interference, at nonzero tilt angle, between the two spin-orbit terms. We show that, in a narrow range of magnetic field orientations, the relaxation rate exhibits anomalous sensitivity to variations of the QD parameters. In this range, the relative change in the relaxation rate with in-plane field orientation is determined {\em solely} by the spin-orbit coupling strengths and by the dot geometry. This allows simultaneous determination of both Rashba and Dresselhaus coupling parameters and the dot ellipticity from analysis of the angular dependence of the relaxation rate.

7 pages, 3 figures. Extended version of paper published in PRB-RC

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Cited by in corpus (14)

• Theory of anisotropic exchange in laterally coupled quantum dots
• Spin-orbit coupling and anisotropic exchange in two-electron double quantum dots
• Electrical control of phonon mediated spin relaxation rate in semiconductor quantum dots: the Rashba vs the Dresselhaus spin-orbit couplings
• Theory of Spin Relaxation in Two-Electron Lateral Coupled Quantum Dots
• Control of electron spin and orbital resonance in quantum dots through spin-orbit interactions
• Optimal geometry of lateral GaAs and Si/SiGe quantum dots for electrical control of spin qubits
• Manipulation of the Land$\acute{\text{e}}$ g-factor in InAs quantum dots through the application of anisotropic gate potentials: Exact diagonalization, numerical and perturbation methods
• Control of a spin qubit in a lateral GaAs quantum dot based on symmetry of gating potential
• Spin relaxation in CdTe quantum dots with a single Mn atom
• Two-dimensional magnetoexcitons in the presence of spin-orbit coupling
• Nuclear-induced time evolution of entanglement of two-electron spins in anisotropically coupled quantum dot
• Spin transition rates in nanowire superlattices: Rashba spin-orbit coupling effects
• Anisotropy of spin-orbit induced electron spin relaxation in [001] and [111] grown GaAs quantum dots
• Spin-relaxation anisotropy in a nanowire quantum dot with strong spin-orbit coupling