CUBIC ANHARMONICITY AND MULTIPHONON VIBRATIONAL-RELAXATION OF ADSORBED MOLECULES

被引:3
作者
PERSSON, BNJ
VOLOKITIN, AI
机构
[1] Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, Postfach 1913, W-5170 Jülich
关键词
D O I
10.1016/0009-2614(91)85127-I
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
For a localized vibration of a linearly bonded adsorbate, with a relative high-frequency displacement coordinate q(a), coupled to a substrate mode with displacement coordinate q(s), we propose a new contribution to the linewidth arising from the cubic terms q(a)2q(s) and q(a)q(s)2 by going to third and higher order in perturbation theory. For third- or higher-order multiphonon processes, this contribution is shown through a specific example to be much more important than the leading-order damping contribution from the term q(a)q(s)n (n > 2), which has been considered by others.
引用
收藏
页码:301 / 304
页数:4
相关论文
共 6 条
  • [1] Eyring H., 1980, BASIC CHEM KINETICS
  • [2] VIBRATIONAL DEPHASING AND ENERGY RELAXATION OF ADMOLECULES BY PHONONS
    HUTCHINSON, M
    GEORGE, TF
    [J]. CHEMICAL PHYSICS LETTERS, 1986, 124 (03) : 211 - 215
  • [3] VIBRATIONAL LINE-SHAPES AT SURFACES
    LANGRETH, DC
    PERSSON, M
    [J]. PHYSICAL REVIEW B, 1991, 43 (02): : 1353 - 1370
  • [4] VIBRATIONAL LINE-SHAPES OF LOW-FREQUENCY ADSORBATE MODES - CO ON PT(111)
    PERSSON, BNJ
    RYBERG, R
    [J]. PHYSICAL REVIEW B, 1989, 40 (15): : 10273 - 10281
  • [5] SHIFT AND BROADENING OF ADSORBATE VIBRATIONAL-MODES
    VOLOKITIN, AI
    BRAUN, OM
    YAKOVLEV, VM
    [J]. SURFACE SCIENCE, 1986, 172 (01) : 31 - 46
  • [6] CUBIC ANHARMONICITY AND STRONG SIDE-BAND - AN EXPERIMENTAL TEST FOR VIBRATIONAL PHASE RELAXATION AT SURFACES
    ZHANG, ZY
    LANGRETH, DC
    [J]. PHYSICAL REVIEW LETTERS, 1987, 59 (19) : 2211 - 2214