Bistability signatures in nonequilibrium charge transport through molecular quantum dots

Abstract

We investigate the transient nonequilibrium dynamics of a molecular junction biased by a finite voltage and strongly coupled to internal vibrational degrees of freedom. Using two different, numerical exact techniques, diagrammatic Monte Carlo and the multilayer multiconfiguration time-dependent Hartree method, we show that the steady state current through the junction may depend sensitively on the initial preparation of the system, thus revealing signatures of bistability. The influence of the bias voltage and the transient dynamics on the phenomenon of bistability is analyzed. Furthermore, a possible relation to the phenomenon of stochastic switching in nanoelectromecanical devices is discussed.

5 pages, 3 figures

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Cited by in corpus (6)

• Vibrationally Induced Decoherence in Single-Molecule Junctions
• Long transient dynamics in the Anderson-Holstein model out of equilibrium
• Crossover from adiabatic to antiadiabatic phonon-assisted tunneling in single-molecule transistors
• Kondo effect and the fate of bistability in molecular quantum dots with strong electron-phonon coupling
• Local density of states on a vibrational quantum dot out of equilibrium
• Conductance of a quantum dot in the Kondo regime connected to dirty wires