GIANT VIBRATIONS OF IMPURITY ATOMS ON A CRYSTAL-SURFACE

被引：31

作者：

MARTINEZ, RE

FONTES, E

GOLOVCHENKO, JA

PATEL, JR

机构：

[1] AT&T BELL LABS,MURRAY HILL,NJ 07974

[2] ROWLAND INST SCI INC,CAMBRIDGE,MA 02142

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.69.1061

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured extremely large anisotropic thermal vibrations of gallium adatoms on a Si(111) surface using x-ray standing waves. At 830 K the rms amplitude normal to the surface is 0.47 +/- 0.02 angstrom while the parallel amplitude is 0.30 +/- 0.02 angstrom. The temperature dependence of these amplitudes deviates significantly from that expected from Debye theory and suggests a significant thermal softening of the surface bonding at elevated temperatures.

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页码：1061 / 1064

页数：4

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