Two-dimensional quantum rotation of adsorbed H2

被引：42

作者：

Svensson, K ^{[1
]}

Bengtsson, L

Bellman, J

Hassel, M

Persson, M

Andersson, S

机构：

[1] Chalmers Univ Technol, Dept Appl Phys, S-41296 Gothenburg, Sweden

[2] Univ Gothenburg, S-41296 Gothenburg, Sweden

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.83.124

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report experimental and theoretical evidence of H-2 adsorbed in a confined quantum rotor state on a stepped copper surface. Rotational transitions of step-adsorbed para-H-2, and ortho-H-2 observed in electron-energy-loss measurements occur close to the energies expected for an ideal 2D rotor. Dramatic enrichment of adsorbed ortho-H-2 is observed at elevated surface temperatures and hydrogen background pressures. Calculations reveal a molecule residing above a step atom and confined to rotate in a two-dimensional manner.

引用

页码：124 / 127

页数：4

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