Mixing of two-electron spin states in a semiconductor quantum dot

Abstract

We show that the low lying spin states of two electrons in a semiconductor quantum dot can be strongly mixed by electron-electron asymmetric exchange. This mixing is generated by the coupling of electron spin to its orbital motion and to the relative orbital motion of the two electrons. The asymmetric exchange can be as large as 50% of the isotropic exchange, even for cylindrical quantum dots. The resulting spin mixing contributes to understanding spin dynamics in quantum dots, including light polarization reversal.

References in corpus (4)

• Quantum Computation with Quantum Dots
• Polarized fine structure in the excitation spectrum of a negatively charged quantum dot
• Semiconductor few-electron quantum dot operated as a bipolar spin filter
• Bipolar spin filter in a quantum dot molecule

Cited by in corpus (5)

• Resolving photon-shortage mystery in femtosecond magnetism
• Electron-hole spin flip-flop in semiconductor quantum dots
• Coherent population trapping combined with cycling transitions for quantum dot hole spins using triplet trion states
• Complete state tomography of a quantum dot confined spin qubit
• Spin-orbit effects on two-electron states in nanowhisker double quantum dots