Zero-point vibration of hydrogen adsorbed on Si and Pt surfaces

被引：46

作者：

Fukutani, K ^{[1
]}

Itoh, A ^{[1
]}

Wilde, M ^{[1
]}

Matsumoto, M ^{[1
]}

机构：

[1] Univ Tokyo, Inst Ind Sci, Meguro Ku, Tokyo 1538505, Japan

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.88.116101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Hydrogen atoms adsorbed on Si(111) and Pt(111) were investigated by nuclear reaction analysis ( NRA) using H-1(N-15, alphagamma)C-12. From measurements of the NRA spectrum at normal and tilted ion incidences the zero-point vibrational energies of H on Si(111) in the perpendicular and parallel directions were found to be 123.4 +/- 4.6 and 44.6 +/- 6.2 meV, respectively, which are consistent with harmonic potentials. The zero-point energies obtained for Pt(111)-H were 80.8 +/- 3.9 and 62.1 +/- 6.0 meV for perpendicular and parallel directions, respectively. These results indicate that the stretching mode is harmonic, while the bending mode is strongly anharmonic.

引用

页码：4 / 116101

页数：4

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