Spin-flip transitions in self-assembled quantum dots. (8th November 2017) - Stavrou, V N
Abstract: Detailed realistic calculations of the spin-flip time ( T 1 ) for an electron in a self-assembled quantum dot (SAQD) due to emission of an acoustic phonon, using only bulk properties with no fitting parameters, are presented. Ellipsoidal lens shaped I n x G a 1 − x As quantum dots, with electronic states calculated using 8-band strain dependent k ⋅ p theory, are considered. The phonons are treated as bulk acoustic phonons coupled to the electron by both deformation potential and piezoelectric interactions. The dependence of T 1 on the geometry of SAQD, on the applied external magnetic field and on the lattice temperature is highlighted. The theoretical results are close to the experimental measurements on the spin-flip times for a single electron in QD.