Heinz Schmid, Hans Biebuyck, et al.
Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures
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. ©2005 The American Physical Society.
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Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures
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