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- W2000780094 abstract "The band structure of SnGe in the zinc-blende structure is calculated using the scalar-relativistic linear-muffin-tin-orbital method in conjunction with the density-functional scheme. The local-density approximation is empirically corrected by means of an external potential. Special emphasis is placed on the effects of inversion asymmetry, such as ionicity and spin splittings. An equilibrium volume is found at a lattice constant of ${mathit{a}}_{0}$=6.0630 AA{}, which is very close to the average of the lattice constants of Ge and ensuremath{alpha}-Sn. At the corresponding volume, the calculated direct gap is +0.085 eV. For a slightly larger lattice constant, corresponding to the average volumes of the two constituents, SnGe should have a gap ``negative'' of nearly the same magnitude, and thus have an inverted band structure similar to ensuremath{alpha}-Sn. The polarity of the Ge-Sn bond is calculated to be lphap = 0.2---. The transverse effective charge is eTtar = 0.47---, Sn being positive (``cation'')." @default.
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- W2000780094 date "1993-12-15" @default.
- W2000780094 modified "2023-10-01" @default.
- W2000780094 title "Calculated band structure of zinc-blende-type SnGe" @default.
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- W2000780094 doi "https://doi.org/10.1103/physrevb.48.17128" @default.
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