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- W2060581640 abstract "The surface-state energies of the Ge(111)-2ifmmodetimeselsetexttimesfi{}1 surface are calculated using a quasiparticle self-energy approach. The surface structural parameters are determined through a local-density-functional total-energy minimization resulting in a buckled ensuremath{pi}-bonded-chain geometry. The quasiparticle energies are computed using a first-order expansion of the electron self-energy operator in the screened Coulomb interaction with a model static dielectric matrix. Our calculated surface-state band gaps and dispersions of both the occupied and unoccupied surface states agree well with experiments. Further, the photoelectric threshold ensuremath{varphi} is found to be 4.73 eV, compared to 4.74--4.80 eV obtained experimentally." @default.
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- W2060581640 date "1991-05-15" @default.
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- W2060581640 title "Quasiparticle surface band structure and photoelectric threshold of Ge(111)-2×1" @default.
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- W2060581640 doi "https://doi.org/10.1103/physrevb.43.12146" @default.
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