Effect of strain on hyperfine-induced hole-spin decoherence in quantum dots

Abstract

We theoretically consider the effect of strain on the spin dynamics of a single heavy-hole (HH) confined to a self-assembled quantum dot and interacting with the surrounding nuclei via hyperfine interaction. Confinement and strain hybridize the HH states, which show an exponential decay for a narrowed nuclear spin bath. For different strain configurations within the dot, the dependence of the spin decoherence time $T_2$ on external parameters is shifted and the non-monotonic dependence of the peak is altered. Application of external strain yields considerable shifts in the dependence of $T_2$ on external parameters. We find that external strain affects mostly the effective hyperfine coupling strength of the conduction band (CB), indicating that the CB admixture of the hybridized HH states plays a crucial role in the sensitivity of $T_2$ on strain.

References in corpus (9)

• Hyperfine interaction in a quantum dot: Non-Markovian electron spin dynamics
• Spin decoherence of a heavy hole coupled to nuclear spins in a quantum dot
• Spin relaxation and decoherence of holes in quantum dots
• Enhancing the Coherence of a Spin Qubit by Operating it as a Feedback Loop That Controls its Nuclear Spin Bath
• Observation of extremely slow hole spin relaxation in self-assembled quantum dots
• Hole - Nuclear Spin Interaction in Quantum Dots
• Nuclear Spins in Nanostructures
• Direct measurement of the hole-nuclear spin interaction in single quantum dots
• Hybridization and spin decoherence in heavy-hole quantum dots

Cited by in corpus (2)

• Prospects for Spin-Based Quantum Computing
• Spin-echo dynamics of a heavy hole in a quantum dot