Strongly coverage-dependent excitations of adsorbed molecular hydrogen

J. A. Gupta; C. P. Lutz; A. J. Heinrich; D. M. Eigler

doi:10.1103/PhysRevB.71.115416

Strongly coverage-dependent excitations of adsorbed molecular hydrogen

J. A. Gupta, C. P. Lutz, A. J. Heinrich, D. M. Eigler

Department of Physics

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57 Scopus citations

Abstract

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.

Original language	English
Article number	115416
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	71
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevB.71.115416
State	Published - 15 Mar 2005

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10.1103/PhysRevB.71.115416

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title = "Strongly coverage-dependent excitations of adsorbed molecular hydrogen",

abstract = "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.",

author = "Gupta, {J. A.} and Lutz, {C. P.} and Heinrich, {A. J.} and Eigler, {D. M.}",

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AU - Eigler, D. M.

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N2 - 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.

AB - 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.

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DO - 10.1103/PhysRevB.71.115416

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JO - Physical Review B - Condensed Matter and Materials Physics

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Strongly coverage-dependent excitations of adsorbed molecular hydrogen

Abstract

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