The effect of symmetry on electron momentum distributions in solids

Abstract
A group-theoretical treatment of the symmetry properties of electron momentum distributions in cubic crystals is given. The contribution to the momentum density from a band not belonging to the totally symmetric representation possesses nodes in certain directions. A selection rule allows the location of these nodes. Tables are presented which summarise the consequences of the selection rule for simple cubic, FCC and BCC lattices, and some examples are discussed.
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