Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2006-10-11
Phys. Rev. B 74, 205320 (2006)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
to appear in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.74.205320
We calculate the zero temperature conductance and characteristic correlation functions of a molecule with a center of mass (CM) motion which modulates couplings to the leads. In the first model studied, the CM vibrational mode is simultaneously coupled to the electron density on the molecule. The conductance is suppressed in regimes corresponding to non-integer occupancy of the molecule. In the second model, where the CM mode is not directly coupled to the electron density, the suppression of conductance is related to the dynamic breaking of the inversion symmetry.
Mravlje Jernej
Ramsak Anton
Rejec Tomaz
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