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'Universal" Conduction-Band Structure in Some Common Semiconductor Compounds

    The conduction bands of direct-gap III-V semiconductors are shown to be effectively universal near
    the T point even when strongly nonparabolic, for energies in effective rydbergs and wave numbers in inverse
    effective lattice constants. This implies universality of the diamagnetic Shubnikov-de Haas effect
    in the nonparabolic regime in some two-dimensional electron gases, as observed experimentally. A twoband
    k p approximation together with Harrison's model-solid theory explains this near universality and
    relates its systematic small deviations to the covalency of the material in question.


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    'Universal" Conduction-Band Structure in Some Common Semiconductor Compounds

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