We observe gap-like and negative differential resistance features in tunneling spectra resulting from transitions between states of H2 in the junction of a low-temperature scanning tunneling microscope. We develop a model for the conductance of a saturable two-state system where transitions are driven by inelastic scattering of tunneling electrons that explains the distinctive lineshapes of these spectral features and can provide information on the residence times in each state.
By: . A. Gupta, C. P. Lutz, A. J. Heinrich, D. M. Eigler
Published in: RJ10303 in 2003
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