Bound states in inversion layers on p-Hg1-xCdxTe are calculated self-consistently taking the interaction of the conduction and valence bands through the surface potential and the k.p interaction explicitly into account. Three different models of the band structure are compared and numerical results are presented. It is shown that the four-band spinless model, proposed by Zawadzki (1983) for InSb, is not appropriate to describe the bound states on Hg1-xCdxTe and more elaborate models, which take the spin-orbit interaction into account, have to be used.
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