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arXiv · 1302.5470

Controlling hole spins in quantum dots and wells

Stefano Chesi·Xiaoya Judy Wang·W. A. Coish
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Abstract

We review recent theoretical results for hole spins influenced by spin-orbit coupling and Coulomb interaction in two-dimensional quantum wells as well as the decoherence of single hole spins in quantum dots due to hyperfine interaction with surrounding nuclear spins. After reviewing the different forms of spin-orbit coupling that are relevant for electrons and heavy holes in III-V semiconductor quantum wells, we illustrate the combined effect of spin-orbit coupling and Coulomb interactions for hole systems on spin-dependent quasiparticle group velocities. We further analyze spin-echo decay for a single hole spin in a nuclear-spin bath, demonstrating that this decoherence source can be controlled in these systems by entering a motional-averaging regime. Throughout this review, we emphasize physical effects that are unique to hole spins (rather than electrons) in nanoscale systems.

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Stefano Chesi, Xiaoya Judy Wang, W. A. Coish. 2013-02-22. Controlling hole spins in quantum dots and wells. https://arxiv.org/abs/1302.5470

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