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 (19)

• 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
• Suppressing Spin Qubit Dephasing by Nuclear State Preparation
• Coherent control and suppressed nuclear feedback of a single quantum dot hole qubit
• Observation of extremely slow hole spin relaxation in self-assembled quantum dots
• Nuclear spin state narrowing via gate--controlled Rabi oscillations in a double quantum dot
• Hole - Nuclear Spin Interaction in Quantum Dots
• Optical control of one and two hole spins in interacting quantum dots
• Hole spin dephasing time associated to hyperfine interaction in quantum dots
• Locking electron spins into magnetic resonance by electron-nuclear feedback
• Enhancement of electron spin coherence by optical preparation of nuclear spins
• Nuclear Spins in Nanostructures
• Coherent optical control of the spin of a single hole in a quantum dot
• Direct measurement of the hole-nuclear spin interaction in single quantum dots
• Hybridization and spin decoherence in heavy-hole quantum dots
• Relaxation of hole spins in quantum dots via two-phonon processes
• Free-induction decay and envelope modulations in a narrowed nuclear spin bath

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