The valence band of InSb is a bit unusual in that the heavy-hole subband exhibits maxima along…

The valence band of InSb is a bit unusual in that the heavy-hole subband exhibits maxima along (111) directions at a k-value slightly removed from k = O. If the heavy-hole maxima are described by parabolic energy surfaces where and are the longitudinal and transverse effective masses, respectively, and if is the effective mass for the light holes in a spherical subband centered at k = 0, obtain an expression for the density of states effective mass characterizing the holes in InSb. Your answer should be expressed in terms of and

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