作者: T. M. Hakim , H. R. Glyde , S. T. Chui
关键词: Atomic physics 、 Anharmonicity 、 Brillouin zone 、 Materials science 、 Phase (matter) 、 Xenon 、 Krypton 、 Dispersion (chemistry) 、 Phonon 、 Dispersion relation
摘要: The self-consistent phonon (SCP) theory is used to study the dynamics of monolayers xenon, krypton, and methane adsorbed on graphite. Only ..sqrt..3 x solid phase considered. It shown that energies Xe are very similar those their floating counterparts, while interaction Kr CH/sub 4/ with graphite significantly affects dispersion curves. gap in curves at center Brillouin zone computed as a function temperature. At critical temperature, goes spontaneously zero transition from locked-in commensurate takes place. This appears describe well. A simple model compared full SCP calculations. one-phonon dynamic form factor, including cubic anharmonic term, lifetimes also evaluated for 4/.