Spin relaxation in an InAs quantum dot in the presence of terahertz driving fields

Details Spin relaxation in an InAs quantum dot in the presence of terahertz driving fields Spin relaxation in an InAs quantum dot in the presence of terahertz driving fields

2006-10-11

arxiv.org/abs/cond-mat/0610300v2

Phys. Rev. B 75, 035307 (2007)

Physics

Condensed Matter

Materials Science

8 pages, 1 figure, to be published in PRB

Scientific paper

10.1103/PhysRevB.75.035307

The spin relaxation in a 1D InAs quantum dot with the Rashba spin-orbit coupling under driving THz magnetic fields is investigated by developing the kinetic equation with the help of the Floquet-Markov theory, which is generalized to the system with the spin-orbit coupling, to include both the strong driving field and the electron-phonon scattering. The spin relaxation time can be effectively prolonged or shortened by the terahertz magnetic field depending on the frequency and strength of the terahertz magnetic field. The effect can be understood as the sideband-modulated spin-phonon scattering. This offers an additional way to manipulate the spin relaxation time.

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