Spin splitting of the electron subbands in the electrostatic interface potential on HgCdTe

Abstract
The authors determine the electric-field-induced spin splitting of the electron subbands on the surface of narrow gap HgCdTe from measurements of the oscillatory magnetoconductivity and cyclotron resonance. The coalescence and crossing of the Landau levels in the Shubnikov-de Haas oscillations is analysed in terms of the model developed by Bychkov and Rashba (extended to include nonparabolicity). Together with the resonance data it allows them to obtain the dispersion E0+or-(k/sub ///) of the electrically spin-split ground state subband. The experiments provide for the first time a number to be compared with sophisticated subband calculations.