Spin relaxation due to the phonon modulation of the spinorbit interaction in quantum dots
We calculate the spin relaxation rates in InAs parabolic quantum dots due to the spin interaction with acoustical phonons. The electronphonon deformation potential and piezoelectric interaction are described by means of the PavlovFirsov spinphonon Hamiltonian. Our results demonstrate that for narrow gap materials the deformation potential interaction becomes dominant. This behavior is not observed in wide or intermediate gap semiconductors, where the piezoelectric coupling, in general, governs the relaxation processes. We also show that the spin relaxation rates are particularly sensitive to the value of the Land g-factor, which depends strongly on the confinement.
spin relaxation quantum dots piezoelectric coupling spin-orbit coupling scattering by phonons electronic structure of nanoscale materials