Phonon-assisted tunneling and two-channel Kondo physics in molecular junctions

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dc.creatorda Silva, Luis G. Dias
dc.creatorDagotto, Elbio
dc.date2009-02-18
dc.date2009-02-20
dc.date.accessioned2026-07-07T13:15:16Z
dc.date.available2026-07-07T13:15:16Z
dc.descriptionThe interplay between vibrational modes and Kondo physics is a fundamental aspect of transport properties of correlated molecular conductors. We present theoretical results for a single molecule in the Kondo regime connected to left and right metallic leads, creating the usual coupling to a conduction channel with left-right parity ("even"). A center-of-mass vibrational mode introduces an additional, phonon-assisted, tunneling through the antisymmetric ("odd") channel. A non-Fermi liquid fixed point, reminiscent of the two-channel Kondo effect, appears at a critical value of the phonon-mediated coupling strength. Our numerical renormalization-group calculations for this system reveal non-Fermi-liquid behavior at low temperatures over lines of critical points. Signatures of this strongly correlated state are prominent in the thermodynamic properties and in the linear conductance.
dc.description5 pages, 4 figures; to appear in Phys. Rev. B
dc.identifierhttps://arxiv.org/abs/0902.3225
dc.identifierhttp://arxiv.org/abs/0902.3225
dc.identifierPhys. Rev. B 79 155302 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.155302
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/230425
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titlePhonon-assisted tunneling and two-channel Kondo physics in molecular junctions
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