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- W2031633929 abstract "We report experiments in which we attempted to grow Ge and Si0.2Ge0.8 films with a tetragonal crystal structure on InP(001). The substrate was chosen because it has approximately the same lattice constant as the tetragonal SixGe1−x a-axis lattice constant. The tetragonal structure has been observed previously in Ge, and has a 1.5-eV bandgap. Theory predicts that the gap is direct, which implies that tetragonal SixGe1−x films are suitable for optoelectronic devices. Growth on the InP(001) (2×3) and (2×4) reconstructed surfaces was investigated. Some evidence for the tetragonal phase was obtained for the growth of Si0.2Ge0.8 at 100 °C on the two reconstructions, but no evidence was obtained for growth of either tetragonal Si0.2Ge0.8 or Ge on the (2×3) reconstruction for growth temperatures at or above 130 °C. We conclude that tetragonal SixGe1−x films on InP(001) does not seem to be a technologically feasible material system." @default.
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- W2031633929 date "2002-01-01" @default.
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- W2031633929 title "Quest for an optoelectronic material: tetragonal SixGe1−x films" @default.
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- W2031633929 doi "https://doi.org/10.1016/s0040-6090(01)01684-4" @default.
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