IONIZED-IMPURITY-LIMITED MOBILITY AND BAND STRUCTURE OF MERCURIC SELENIDE

A calculation is performed, in the Born approximation, of the ionized-impurity-limited conductivity of a conduction band with the Kane form, taking into account the symmetry of the conduction-band wave functions. Using the band parameters for mercuric selenide obtained by Whitsett from Shubnikov-de Haas measurements, it is shown that Whitsett's 4.2 K mobilities as a function of electron concentration are in excellent agreement with the results of a calculation for a Γ8 band edge, but not with those for a Γ6 band edge. It is also pointed out that Whitsett's band parameters require a much smaller valence-band overlap than that obtained by Harman. These results indicate an inverted, gray-tin-type structure for mercuric selenide. © 1969 The American Physical Society.