Investigation of localization in using hyperfine interaction
High Magnetic Field Laboratory, Max-Planck-Institut
für Festkörperforschung Centre National de la Recherche Scientifique
B.P. 166, F-38042 Grenoble Cedex 9, France
Accepted: 2 November 1999
At magnetic fields where an oscillatory structure in the Hall constant points to the localization of electrons, we investigate the NMR-induced change in the transverse magnetoresistivities. Because the nuclear hyperfine field BHF acts only on the spin of the electrons, the role of spin-splitting can be seperated from that of the external magnetic field for the magnetic field dependence of RH. This experiment shows that the oscillatory structure in RH is directly related to a redistribution in the occupation of the two spin states in the lowest Landau level.
PACS: 72.20.My – Galvanomagnetic and other magnetotransport effects / 72.80.Ey – III-V and II-VI semiconductors
© EDP Sciences, 2000