Phonon-Induced Pure Dephasing of Two-Electron Spin States in Vertical Quantum Dot Molecules

Abstract

Phonon-induced dephasing of two-electron spin states in two vertically stacked self-assembled CaAs/InGaAs quantum dots is studied. A pure dephasing process clue to elastic phonon scattering is found to dominate at low temperatures.

This process is independent of the spin-orbit coupling and does not require the presence of a magnetic field.

Keywords

• Phonon-Induced
• Pure
• Dephasing
• Two-Electron
• Spin
• States
• Vertical
• Quantum
• Dot
• Molecules