Strongly coverage-dependent excitations of adsorbed molecular hydrogen

被引：59

作者：

Gupta, JA ^{[1
]}

Lutz, CP ^{[1
]}

Heinrich, AJ ^{[1
]}

Eigler, DM ^{[1
]}

机构：

[1] IBM Corp, Almaden Res Ctr, Div Res, San Jose, CA 95120 USA

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 11期

关键词：

D O I：

10.1103/PhysRevB.71.115416

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have observed prominent nonlinearities in differential conductance spectra of H-2 on copper surfaces using a low-temperature scanning tunneling microscope. These nonlinearities result from transitions between states of H-2 with distinct conductances. Tunneling electrons drive these transitions by giving up energy to highly coverage-dependent excitations that do not correspond to known vibrational or rotational modes of H-2. The nonlinear conductance features can be modeled by extending the conventional framework for inelastic electron tunneling spectroscopy to include saturation effects.

引用

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