SURFACE PHONONS IN INP(110)

被引：51

作者：

NIENHAUS, H

MONCH, W

机构：

[1] Laboratorium für Festkörperphysik, Gerhard-Mercator-Universität Duisburg, D-47048 Duisburg

来源：

SURFACE SCIENCE | 1995年 / 328卷 / 03期

关键词：

ELECTRON ENERGY LOSS SPECTROSCOPY; INDIUM PHOSPHIDE; LOW INDEX SINGLE CRYSTAL SURFACES; PHONONS;

D O I：

10.1016/0039-6028(95)00234-0

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：

The surface phonon dispersion of cleaved InP(110) surfaces was measured by use of high-resolution electron energy-loss spectroscopy (HREELS) along the symmetry directions <(Gamma X)over bar> and <(Gamma X')over bar>, i.e., parallel and perpendicular to the surface In-P chains. Besides an acoustic surface phonon branch with energy lower than 9 meV, four optical phonon bands with little dispersion were recorded at 9.5, 19.5, 30.5 to 33.5, and 42.3 meV. The band with excitation energies around 32 meV represents a true surface mode as it is located in the energy gap between the acoustic and optical bulk phonon bands. The results are compared with available calculations of InP(110) surface phonons.

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页码：L561 / L565

页数：5

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