Phonon-induced electron relaxation in weakly-confined single and coupled quantum dots

Abstract

We investigate charge relaxation rates due to acoustic phonons in weakly-confined quantum dot systems, including both deformation potential and piezoelectric field interactions. Single-electron excited states lifetimes are calculated for single and coupled quantum dot structures, both in homonuclear and heteronuclear devices. Piezoelectric field scattering is shown to be the dominant relaxation mechanism in many experimentally relevant situations. On the other hand, we show that appropriate structure design allows to minimize separately deformation potential and piezolectric field interactions, and may bring electron lifetimes in the range of microseconds.

20 pages (preprint format), 7 figures, submitted to Physical Review B

References in corpus (1)

• Charge qubit dynamics in a double quantum dot coupled to phonons

Cited by in corpus (5)

• Direct observation of acoustic phonon mediated relaxation between coupled exciton states in a single quantum dot molecule
• Triplet-Singlet Spin Relaxation in Quantum Dots with Spin-Orbit Coupling
• Effect of electron-electron interaction on the phonon-mediated spin relaxation in quantum dots
• Electron-acoustic-phonon scattering and electron relaxation in two-coupled quantum rings
• Effect of the Coulomb interaction on the electron relaxation of weakly-confined quantum dot systems