Spin relaxation in diluted magnetic semiconductor quantum dots

摘要: Electron spin relaxation induced by phonon-mediated $s\text{\ensuremath{-}}d$ exchange interaction in a II-VI diluted magnetic semiconductor quantum dot is investigated theoretically. The electron--acoustic phonon due to piezoelectric coupling and deformation potential included. resulting lifetime typically on the order of microseconds. effectiveness spin-flip mechanism increases with increasing Mn concentration, electron splitting, vertical confining strength, lateral diameter, while it shows nonmonotonic dependence field temperature. An interesting finding that small suppressed for strong low concentration at