ELECTRON-ENERGY-LOSS CROSS-SECTION AND SURFACE LATTICE-DYNAMICS STUDIES OF NIAL(110)

被引：11

作者：

CHEN, Y

XU, ML

TONG, SY

WUTTIG, M

HOFFMANN, W

FRANCHY, R

IBACH, H

机构：

[1] UNIV WISCONSIN, SURFACE STUDIES LAB, MILWAUKEE, WI 53201 USA

[2] FORSCHUNGSZENTRUM JULICH, INST GRENZFLACHENFORSCH & VAKUUMPHYS, W-5170 JULICH 1, GERMANY

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 09期

关键词：

D O I：

10.1103/PhysRevB.42.5451

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We use a multiple-scattering theory [Phys. Rev. Lett. 44, 407 (1980)] to analyze the electron-energy-loss cross section for the (110) surface of the ordered alloy NiAl. The study indicates that the interatomic forces in the near-surface region are significantly different from the bulk values. We determine a surface lattice-dynamical model which produces good fit to the measured phonon-dispersion curves as well as the electron-energy-loss cross sections. The analysis shows that along the » Y» (i.e., [100]) direction, the polarizations of the two lowest-frequency surface modes are interchanged as they approach the Brillouin-zone boundary. The calculated inelastic-electron-scattering cross sections show significant sensitivity to the surface structure. © 1990 The American Physical Society.

引用

页码：5451 / 5458

页数：8

共 12 条

[1]

Ibach H., 1982, ELECTRON ENERGY LOSS

[2] SURFACE-STRUCTURE ANALYSIS USING REFLECTION HIGH-ENERGY ELECTRON-DIFFRACTION [J].