Gate control of a quantum dot single-electron spin in realistic confining potentials: anisotropy effects

Abstract

Among recent proposals for next-generation, non-charge-based logic is the notion that a single electron can be trapped and its spin can be manipulated through the application of gate potentials. In this paper, we present numerical simulations of such spins in single electron devices for realistic (asymmetric) confining potentials in two-dimensional electrostatically confined quantum dots. Using analytical and numerical techniques we show that breaking the in-plane rotational symmetry of the confining potential leads to a significant effect on the tunability of the g-factor with applied gate potentials. In particular, anisotropy extends the range of tunability to larger quantum dots.

7 pages, 13 figures

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• Orbital mechanisms of electron spin manipulation by an electric field
• Electrical control of spin relaxation in a quantum dot
• Hyperfine-mediated gate-driven electron spin resonance
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Cited by in corpus (11)

• Electrical control of phonon mediated spin relaxation rate in semiconductor quantum dots: the Rashba vs the Dresselhaus spin-orbit couplings
• Manipulation of single electron spin in a GaAs quantum dot through the application of geometric phases: The Feynman disentangling technique
• 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
• Finite difference method for the arbitrary potential in two dimensions: application to double/triple quantum dots
• Gate control of Berry phase in III-V semiconductor quantum dots
• The influence of anisotropic gate potentials on the phonon induced spin-flip rate in GaAs quantum dots
• Geometric spin manipulation in semiconductor quantum dots
• Spin echo dynamics under an applied drift field in graphene nanoribbon superlattices
• Spin-orbit interaction in three-dimensionally bounded semiconductor nanostructures
• Spin transition rates in nanowire superlattices: Rashba spin-orbit coupling effects
• Heavy-hole spin relaxation in quantum dots: Isotropic versus anisotropic effects