Spin-orbit induced hole spin relaxation in InAs and GaAs quantum dots

Abstract

We study the effect of valence band spin-orbit interactions on the acoustic phonon assisted spin relaxation of holes confined in quantum dots. Heavy hole-light hole (hh-lh) mixing and all the spin-orbit terms arising from zinc-blende bulk inversion asymmetry (BIA) are considered on equal footing in a fully 3D Hamiltonian. We show that hh-lh mixing and BIA have comparable contributions to the hole spin relaxation in self-assembled QDs, but BIA becomes dominant in gated QDs. The dependence of the hole spin relaxation on the QD geometry and spin splitting energy is drastically different from that of electrons, with a non-monotonic behavior which results from the interplay between SOI terms. Our results reconcile contradictory predictions of previous theoretical works and are consistent with experiments.

To be published in New Journal of Physics

References in corpus (10)

• Spin relaxation and decoherence of holes in quantum dots
• Observation of extremely slow hole spin relaxation in self-assembled quantum dots
• Hole - Nuclear Spin Interaction in Quantum Dots
• Direct measurement of the hole-nuclear spin interaction in single quantum dots
• Spin interactions, relaxation and decoherence in quantum dots
• Hole spin relaxation in semiconductor quantum dots
• Spin Orbit Mediated Manipulation of Heavy Hole Spin Qubit in Gated Semiconductor Nanodevices
• Phonon-induced electron relaxation in weakly-confined single and coupled quantum dots
• Optical alignment and polarization conversion of neutral exciton spin in individual InAs/GaAs quantum dots
• All-electric qubit control in heavy hole quantum dots via non-Abelian geometric phases

Cited by in corpus (11)

• Optimal operation points for ultrafast, highly coherent Ge hole spin-orbit qubits
• Quantum Computing with Acceptor Spins in Silicon
• Spin blockade as a probe of Zeeman interactions in hole quantum dots
• Photon phase shift at the few-photon level and optical switching by a quantum dot in a microcavity
• Blurring the boundaries between topological and non-topological phenomena in dots
• Hole spin-flip transitions in a self-assembled quantum dot
• Quantum limit for nuclear spin polarization in semiconductor quantum dots
• Anisotropy of spin-orbit induced electron spin relaxation in [001] and [111] grown GaAs quantum dots
• Measurement of enhanced spin-orbit coupling strength for donor-bound electron spins in silicon
• Spin-orbit coupling and spin relaxation of hole states in [001]- and [111]-orientedquantum dots of various geometry
• Spin-orbit-induced hole spin relaxation in a quantum dot molecule: the effect of $s$-$p$ coupling