SHEAR HORIZONTAL PHONONS ON NI(110)

被引：21

作者：

BALDEN, M ^{[1
]}

LEHWALD, S ^{[1
]}

IBACH, H ^{[1
]}

ORMECI, A ^{[1
]}

MILLS, DL ^{[1
]}

机构：

[1] UNIV CALIF IRVINE,DEPT PHYS,IRVINE,CA 92717

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.46.4172

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The dispersion curve of the shear horizontal surface phonon along GAMMABAR XBAR ([110BAR]) on Ni(110) has been measured with use of high-resolution electron-energy-loss spectroscopy. The frequency of this phonon at XBAR is found to be 169 cm-1. Theoretical calculations provide an excellent account of the loss spectra measured in scattering geometries where excitation of shear horizontal modes is forbidden, and those in which they contribute strongly. The frequency of the shear horizontal phonon at YBAR is measured also, and found to be approximately 116 cm-1. A model introduced earlier for Ni(110) is in reasonable accord with the data, though a full account requires the introduction of noncentral forces into the lattice dynamics.

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页码：4172 / 4179

页数：8

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