Dynamics of coupled spins in quantum dots with strong spin-orbit interaction

Abstract

We investigated the time dependence of two-electron spin states in a double quantum dot fabricated in an InAs nanowire. In this system, spin-orbit interaction has substantial influence on the spin states of confined electrons. Pumping single electrons through a Pauli spin-blockade configuration allowed to probe the dynamics of the two coupled spins via their influence on the pumped current. We observed spin-relaxation with a magnetic field dependence different from GaAs dots, which can be explained by spin-orbit interaction. Oscillations were detected for times shorter than the relaxation time, which we attribute to coherent evolution of the spin states.

5 pages, 4 figures

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Cited by in corpus (10)

• Anomalous Josephson effect induced by spin-orbit interaction and Zeeman effect in semiconductor nanowires
• Multi-mode Fabry-Pérot conductance oscillations in suspended stacking-faults-free InAs nanowires
• Josephson Current through Semiconductor Nanowire with Spin-Orbit Interaction in Magnetic Field
• Spin-orbit coupling and anisotropic exchange in two-electron double quantum dots
• Spin-orbit effects in nanowire-based wurtzite semiconductor quantum dots
• Spin-dependent tunneling into an empty lateral quantum dot
• Phase-Sensitive Probes of Nuclear Polarization in Spin-Blockaded Transport
• Electric manipulation of electron spin relaxation induced by confined phonons in nanowire-based double quantum dots
• Generation of spin-polarized current using multi-terminated quantum dot with spin-orbit interaction
• Singlet-triplet relaxation induced by confined phonons in nanowire-based quantum dots