Nuclear-spin relaxation and spin excitons in a two-dimensional electron gas
Abstract
The nuclear-spin relaxation in the vicinity of a two-dimensional electron channel is considered in terms of the creation and annihilation of spin excitons. This approach provides a qualitative picture of the competition between the inhomogeneity of the channel and the Coulomb repulsion of the electrons. The spin-flip processes are allowed energetically in the presence of the disorder. The e-e interaction suppresses the relaxation through the enhancement of the magnetic-field-induced spin splitting of the Landau level.
- Publication:
-
Physical Review B
- Pub Date:
- September 1991
- DOI:
- 10.1103/PhysRevB.44.6554
- Bibcode:
- 1991PhRvB..44.6554I
- Keywords:
-
- 73.20.Dx;
- 76.30.Pk;
- 76.60.-k;
- Conduction electrons;
- Nuclear magnetic resonance and relaxation