Suppression of spin relaxation in an InAs nanowire double quantum dot

Abstract

We investigate the triplet-singlet relaxation in a double quantum dot defined by top-gates in an InAs nanowire. In the Pauli spin blockade regime, the leakage current can be mainly attributed to spin relaxation. While at weak and strong inter-dot coupling relaxation is dominated by two individual mechanisms, the relaxation is strongly reduced at intermediate coupling and finite magnetic field. In addition we observe a charateristic bistability of the spin-non conserving current as a function of magnetic field. We propose a model where these features are explained by the polarization of nuclear spins enabled by the interplay between hyperfine and spin-orbit mediated relaxation.

5 pages, 4 figures

References in corpus (10)

• Driven coherent oscillations of a single electron spin in a quantum dot
• Single-shot readout of electron spin states in a quantum dot using spin-dependent tunnel rates
• Direct Measurement of the Spin-Orbit Interaction in a Two-Electron InAs Nanowire Quantum Dot
• Singlet-triplet decoherence due to nuclear spins in a double quantum dot
• Spin-Orbit Mediated Control of Spin Qubits
• Spin relaxation and anticrossing in quantum dots: Rashba versus Dresselhaus spin-orbit coupling
• Experimental signature of phonon-mediated spin relaxation
• Bistability of the Nuclear Polarisation created through optical pumping in InGaAs Quantum Dots
• Nonlinear dynamics of quantum dot nuclear spins
• Spin entanglement induced by spin-orbit interactions in coupled quantum dots

Cited by in corpus (18)

• Prospects for Spin-Based Quantum Computing
• Electron counting in quantum dots
• Valley-spin blockade and spin resonance in carbon nanotubes
• Multi-mode Fabry-Pérot conductance oscillations in suspended stacking-faults-free InAs nanowires
• Spin state mixing in InAs double quantum dots
• Directional and dynamic modulation of the optical emission of an individual GaAs nanowire using surface acoustic waves
• Stationary and transient leakage current in the Pauli spin blockade
• Phase Transitions in Dissipative Quantum Transport and Mesoscopic Nuclear Spin Pumping
• Singlet-Triplet Physics and Shell Filling in Carbon Nanotube Double Quantum Dots
• Superradiance-like Electron Transport through a Quantum Dot
• Hysteretic behavior in weakly coupled double-dot transport in the spin blockade regime
• Dynamics of coupled spins in quantum dots with strong spin-orbit interaction
• Nuclear spin pumping and electron spin susceptibilities
• Theory of spin qubits in nanostructures
• Singlet-triplet relaxation induced by confined phonons in nanowire-based quantum dots
• Pauli spin-blockade in an InAs nanowire double quantum dot
• Magnetic field induced effects in the high source-drain bias current of weakly coupled vertical quantum dot molecules
• Gate-dependent spin-orbit coupling in multi-electron carbon nanotubes