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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• Generalized projected dynamics for non-system observables of non-equilibrium quantum impurity models
• Numerically exact, time-dependent study of correlated electron transport in model molecular junctions
• Green's function methods for single molecule junctions
• Influence of vibrational modes on the quantum transport through a nano-device
• Hierarchical quantum master equation approach to electronic-vibrational coupling in nonequilibrium transport through nanosystems: Reservoir formulation and application to vibrational instabilities
• Transient dynamics and waiting time distribution of molecular junctions in the polaronic regime
• The Anderson--Holstein Model in Two Flavors of the Non--Crossing Approximation
• Sub-Ohmic to super-Ohmic crossover behavior in nonequilibrium quantum systems with electron-phonon interactions
• Current Noise in Single-Molecule Junctions Induced by Electronic-Vibrational Coupling
• Vibrationally Induced Decoherence in Single-Molecule Junctions
• Long transient dynamics in the Anderson-Holstein model out of equilibrium
• Multiconfiguration time-dependent Hartree impurity solver for nonequilibrium dynamical mean-field theory
• Crossover from adiabatic to antiadiabatic phonon-assisted tunneling in single-molecule transistors
• Many-body Green's function theory for electron-phonon interactions: the Kadanoff-Baym approach to spectral properties of the Holstein dimer
• Molecular junctions and molecular motors: Including Coulomb repulsion in electronic friction using nonequilibrium Green's functions
• Dressed tunneling approximation for electronic transport through molecular transistors
• Phonon dynamics in correlated quantum systems driven away from equilibrium
• Many-body Green's function theory for electron-phonon interactions: ground state properties of the Holstein dimer
• Thermodynamics of the polaron master equation at finite bias
• A Quasi-Classical Mapping Approach to Vibrationally Coupled Electron Transport in Molecular Junctions
• Vibrationally dependent electron-electron interactions in resonant electron transport through single-molecule junctions
• Non-Adiabatic Effects of Nuclear Motion in Quantum Transport of Electrons: A Self-Consistent Keldysh-Langevin Study
• The multi-configurational time-dependent Hartree approach in optimized second quantization: imaginary time propagation and particle number conservation
• Transient dynamics in interacting nanojunctions within self-consistent perturbation theory
• Quantum Transport With Two Interacting Conduction Channels
• Kondo effect and the fate of bistability in molecular quantum dots with strong electron-phonon coupling
• Transient dynamics and steady state behavior of the Anderson-Holstein model with a superconducting lead
• Nonadiabatic Van der Pol oscillations in molecular transport
• On the Accuracy of the Noninteracting Electron Approximation for Vibrationally Coupled Electron Transport
• Spin-vibronics in interacting nonmagnetic molecular nanojunctions
• Transient currents of a single molecular junction with a vibrational mode
• Transient dynamics of an adiabatic NEMS
• Local density of states on a vibrational quantum dot out of equilibrium
• Charge and heat transport of soft nanosystems in the presence of time-dependent perturbations
• Conductance of a quantum dot in the Kondo regime connected to dirty wires
• Bi-stability in single impurity Anderson model with strong electron-phonon interaction (polaron regime)
• Randomly Fluctuating Potential Controlled Multistable Resonant Tunneling Current through a Quantum Dot