1 research outputs found
Spin relaxation of two-dimensional electrons with a hierarchy of spin-orbit couplings
The density matrix formalism is applied to calculate the spin-relaxation time
for two-dimensional systems with a hierarchy of spin-orbit couplings, such as
Rashba-type, Dresselhaus-type and so on. It is found that the spin-relaxation
time can be infinite if those coupling strengths , ,
and satisfy either condition (i) or (ii)
, which correspond to the vanishing Yang-Mills
"magnetic" field. The effect caused by the application of an external magnetic
field is also discussed. It is found that the longitudinal and in-plane spin
components can possess infinite life time when the spin components, the Larmor
precession frequency and the external magnetic field satisfy certain relations.Comment: Revtex, 7 pages, 3 figure