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- W2014226757 abstract "In this paper, a calculation is attempted of the interatomic distance at which a face-centred cubic lattice of helium atoms becomes a metal, i.e., at which valence and conduction bands begin to overlap. Furthermore, the pressure which corresponds to this interatomic distance is estimated by means of the Thomas-Fermi equation of state. In one model used (the `ionic' one) an electron in the crystal sees a helium ion at the lattice position to which it is nearest, and neutral helium atoms at the other lattice positions; thus the `Fermi hole' is crudely accounted for. A slightly more refined model deals with exchange and correlation in a way similar to that of Bohm and Pines. In both cases, points of high symmetry in the Brillouin zone are used, and the Bloch wave functions are expanded in terms of the corresponding suitable linear combinations of simple plane waves; the convergence problem involved is discussed." @default.
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- W2014226757 date "1957-02-01" @default.
- W2014226757 modified "2023-10-16" @default.
- W2014226757 title "Calculation of the Interatomic Distance at which a Model of Compressed Solid Helium becomes a Metal" @default.
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- W2014226757 doi "https://doi.org/10.1088/0370-1298/70/2/301" @default.
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