1303.0211 (M. P. Nowak et al.)

Spontaneous and resonant lifting of the spin blockade in nanowire
quantum dots    [PDF]

M. P. Nowak, B. Szafran

A complete description of the dynamics of a two-electron system confined in narrow nanowire quantum dots under oscillating electric field and phonon mediated relaxation is presented in the context of recent electric dipole spin resonance experiments. We find that spin-orbit coupling results in lifting the spin blockade by spin non-conserving phonon mediated relaxation provided that the initial state is close in energy to the ground state which results in deblocking one of the Zeeman split triplets. At higher magnetic field, after singlet-triplet anticrossing new channel for lifting the Pauli blockade opens which results in an appearance of additional resonance lines, as present in recent experimental results [S. M. Frolov, et al., Phys. Rev. Lett. 109, 236805 (2012)].

View original: http://arxiv.org/abs/1303.0211