Self-consistent theory of molecular switching

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dc.creatorPistolesi, Fabio
dc.creatorBlanter, Yaroslav M.
dc.creatorMartin, Ivar
dc.date2008-06-06
dc.date.accessioned2026-07-07T12:19:22Z
dc.date.available2026-07-07T12:19:22Z
dc.descriptionWe study the model of a molecular switch comprised of a molecule with a soft vibrational degree of freedom coupled to metallic leads. In the presence of strong electron-ion interaction, different charge states of the molecule correspond to substantially different ionic configurations, which can lead to very slow switching between energetically close configurations (Franck-Condon blockade). Application of transport voltage, however, can drive the molecule far out of thermal equilibrium and thus dramatically accelerate the switching. The tunneling electrons play the role of a heat bath with an effective temperature dependent on the applied transport voltage. Including the transport-induced "heating" selfconsistently, we determine the stationary current-voltage characteristics of the device, and the switching dynamics for symmetric and asymmetric devices. We also study the effects of an extra dissipative environment and demonstrate that it can lead to enhanced non-linearities in the transport properties of the device and dramatically suppress the switching dynamics.
dc.identifierhttps://arxiv.org/abs/0806.1151
dc.identifierhttp://arxiv.org/abs/0806.1151
dc.identifierPhysical Review B 78 (2008) 085127
dc.identifierdoi:10.1103/PhysRevB.78.085127
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/212728
dc.subjectMesoscale and Nanoscale Physics
dc.titleSelf-consistent theory of molecular switching
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