Interpretation of Magnetoconductivity inn-Type Germanium and Silicon

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Abstract
The phenomenological magnetoconductance coefficients of a cubic crystal, which were introduced by Seitz, are expressed in terms of the phenomenological magnetoconductance constants of a single valley for energy bands consisting of [111] valleys and of [100] valleys. It is found that the so-called "symmetry conditions" on the magnetoconductance depend on the vanishing in the principal axis directions of the longitudinal magnetoconductance coefficients of a single valley. Combinations of the magnetoconductance coefficients are also found which constitute approximate measures of the transverse magnetoconductivity and the anisotropy of a single valley.