The observation of commensurability oscillations in an AlAs two dimensional electron system was presented where two conduction band valleys with elliptical in plane Fermi contours are occupied. The Fourier power spectrum of the oscillations shows two frequency components consistent with those expected for the Fermi contours of the two valleys. The study extract more information, such as the amplitude, phase and scattering time for the COs of each valley by performing partial inverse Fourier analysis. It was observed that ml/mt = 5.2±0.5 for the ratio of the longitudinal and transverse electron effective masses cannot directly measured from other transport experiments.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)