Nuclear spin relaxation via dipolar interaction in a two-dimensional electron gas
Ovchinnikov Yu. N., Vagner I. D., Dyugaev A. M.
The nuclear spin-lattice relaxation in a two-dimensional electron gas under quantizing magnetic fields is considered. It is shown that in contrast with the case of three-dimensional conductors and two-dimensional systems with sufficient degree of disorder, where the hyperflne contact interaction is operative in the relaxation of the nuclear spins, the dipole-dipole interaction between the nuclear and the conduction electron spins in sufficiently pure two-dimensional systems can be the leading mechanism for the nuclear spin relaxation.