Abstract
A Mn-porphyrin was contacted on Au(111) in a low-temperature scanning tunneling microscope (STM). Differential conductance spectra show a zero-bias resonance that is due to an underscreened Kondo effect according to many-body calculations. When the Mn center is contacted by the STM tip, the spectrum appears to invert along the voltage axis. A drastic change in the electrostatic potential of the molecule involving a small geometric relaxation is found to cause this observation.
- Received 6 February 2015
DOI:https://doi.org/10.1103/PhysRevLett.115.016802
© 2015 American Physical Society
Synopsis
Molecular Voltage Shift
Published 2 July 2015
Small changes in the configuration of a molecule can significantly influence its resistive behavior in a circuit.
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