Vibrational properties of the Sb:InP(110) surface

被引：1
|
作者：
Tütüncü, HM
Srivastava, GP
Ugur, G
机构：
[1] Univ Exeter, Dept Phys, Exeter EX4 4QL, Devon, England
[2] Sakarya Univ, Fen Edebiyat Fak, Fiz Bolumu, Adapazari, Turkey
[3] Gazi Univ, Fan Edebiyat Fak, Fiz Bolumu, Ankara, Turkey
来源：
SURFACE SCIENCE | 2002年 / 507卷
关键词：
indium phosphide; ab initio quantum chemical methods and calculations; vibrations of adsorbed molecules; chemisorption;
D O I：
10.1016/S0039-6028(02)01165-2
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：
We have studied the lattice dynamics of a monolayer antimony-covered InP(110) surface by combining the density-functional-pseudopotential theory and an adiabatic bond-charge model. It is found that the deposition of Sb on InP(110) leads to several characteristic vibrational features. In particular, due to the large mass of the Sb atom, the Rayleigh vibrational mode becomes fully localised near the zone edges, lying well below the acoustic continuum of bulk InP. While the surface vibrational modes are removed from the interior of the acoustic-optical gap region, there are still reasonably large peaks in the density of states in the gap towards the bulk continuum edges. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
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页码：1 / 6
页数：6
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