We measured Shubnikov-de Haas (SdH) oscillations in GaAs (100) two-dimensional holes to determine the inversion asymmetry-induced spin splitting. The Fourier spectrum of the SdH oscillations contains two peaks, at frequencies f− and f+, that correspond to the hole densities of the two spin subbands and a peak, at frequency ftot, corresponding to the total hole density. In addition, the spectrum exhibits an anomalous peak at ftot/2. We also determined the effective masses of the two spin subbands by finding the inverse transform of the Fourier spectrum in the vicinity of f− and f+, and then analyzing the temperature dependence of the SdH oscillations for each subband. We discuss our results in light of self-consistent calculations and previous experiments.
|Original language||English (US)|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - Mar 24 2004|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics