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- W2073524967 abstract "We present a theoretical and experimental study on the phonon dynamics of the low-temperature Sn/Ge(1 1 1)-(3 × 3) structure. High-resolution helium atom scattering (HAS) data show that, besides the Rayleigh wave, there are three surface phonon branches with low dispersion related to the (3 × 3) surface phase. Their energies are approximately 6.5, 4, and 3 meV at the Γ¯ point. In addition, we detect phonon peaks in the Q range 0.4–0.5 Å−1 at ~2 meV, which correspond to (3 × 3) folding of the Rayleigh wave. Ab initio DFT–GGA total energy calculations have been performed to determine the frequencies associated with the vertical displacements of the three Sn atoms in the unit cell. The values obtained are in good agreement with the experiment." @default.
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- W2073524967 date "2004-10-01" @default.
- W2073524967 modified "2023-10-18" @default.
- W2073524967 title "Phonon dynamics of the Sn/Ge(111)-(3 × 3) surface" @default.
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- W2073524967 doi "https://doi.org/10.1016/j.apsusc.2004.06.150" @default.
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