Spin polarization anisotropy in a narrow spin-orbit-coupled nanowire quantum dot

Abstract

One and two-electron systems confined in a single and coupled quantum dots defined within a nanowire with a finite radius are studied in the context of spin-orbit coupling effects. Anisotropy of the spin-orbit interaction is discussed in terms of the system geometry and orientation of the external magnetic field vector. We find that there are easy and hard spin polarization axes and in the quantum dot with strong lateral confinement electron spin becomes well defined in spite of the presence of spin-orbit coupling. We present an analytical solution for the one-dimensional limit and study its validity for nanowires of finite radii by comparing the results with a full three-dimensional calculation. The results are also confronted with the recent measurements of the effective Lande factor and avoided crossing width anisotropy in InSb nanowire quantum dots [S. Nadj-Perge et al., Phys. Rev. Lett. 108, 166801 (2012)].

References in corpus (14)

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• Coherent control of a single electron spin with electric fields
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• Emergence of the persistent spin helix in semiconductor quantum wells
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• Spin-Orbit Mediated Control of Spin Qubits
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• Tuning of the spin-orbit interaction in a quantum dot by an in-plane magnetic field
• Spin-orbit mediated anisotropic spin interaction in interacting electron systems
• Suppression of Zeeman gradients by nuclear polarization in double quantum dots
• Electric manipulation of electron spin relaxation induced by confined phonons in nanowire-based double quantum dots
• Singlet-triplet relaxation induced by confined phonons in nanowire-based quantum dots
• Spin-orbit induced spin-qubit control in nanowires

Cited by in corpus (19)

• Controlling a Nanowire Spin-Orbit Qubit via Electric-Dipole Spin Resonance
• Spin-orbit coupling effects in zinc-blende InSb and wurtzite InAs nanowires: Realistic calculations with multiband $\vec{k}\cdot \vec{p}$ method
• Spin-orbit coupling and electric-dipole spin resonance in a nanowire double quantum dot
• Control of the Two-Electron Exchange Interaction in a Nanowire Double Quantum Dot
• Anisotropic exchange coupling in a nanowire double quantum dot with strong spin-orbit coupling
• The impacts of the quantum-dot confining potential on the spin-orbit effect
• A spin dephasing mechanism mediated by the interplay between the spin-orbit coupling and the asymmetrical confining potential in semiconductor quantum dot
• Charge noise induced spin dephasing in a nanowire double quantum dot with spin-orbit coupling
• Energy spectrum, the spin polarization, and the optical selection rules of the Kronig-Penney superlattice model with spin-orbit coupling
• Measurements of anisotropic g-factors for electrons in InSb nanowire quantum dots
• Low-symmetry nanowire cross-sections for enhanced Dresselhaus spin-orbit interaction
• Electrical manipulation of a hole `spin'-orbit qubit in nanowire quantum dot: the nontrivial magnetic field effects
• Anisotropy of spin-orbit induced electron spin relaxation in [001] and [111] grown GaAs quantum dots
• Spin manipulation and spin dephasing in quantum dot integrated with a slanting magnetic field
• Hyperfine interaction mediated electric-dipole spin resonance: the role of frequency modulation
• Spin-photon interaction in a nanowire quantum dot with asymmetrical confining potential
• Single-electron shell occupation and effective $g$-factor in few-electron nanowire quantum dots
• Spin-relaxation anisotropy in a nanowire quantum dot with strong spin-orbit coupling
• Searching strong `spin'-orbit coupled one-dimensional hole gas in strong magnetic fields