Temperature dependent conductances of deformable molecular devices

Abstract

Transport through a molecular device coupled to a vibrational mode is studied. By mapping it to the Yu-Anderson model in the large contact broadening limit, the zero bias electric and heat conductances are evaluated non-perturbatively. These exhibit a step from their T=0 value to half of its value as T increases due to the opening of the inelastic scattering channel. The spectral function exhibits the Franck-Condon suppressed multiphonon steps. The Wiedemann-Franz law is satisfied at low and high temperatures, but is violated in between. Relations to experiments are discussed.

5 pages, 2 figures

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Cited by in corpus (5)

• Iterative summation of path integrals for nonequilibrium molecular quantum transport
• Iterative path integral summation for nonequilibrium quantum transport
• Quantum quenches and driven dynamics in a single-molecule device
• Single-molecule-mediated heat current between an electronic and a bosonic bath
• Minimum entropy production effect on a quantum scale