Kinetic Schemes in Open Interacting Systems

Nitzan, Abraham; Galperin, Michael

doi:10.1021/acs.jpclett.8b01886

Cited by 17 publications

(18 citation statements)

References 43 publications

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“…Mechanical instability of this sort was extensively studied and analyzed theoretically 1 − 9 and experimentally. 10 − 14 When the charged molecule is associated with a repulsive potential energy surface for the nuclei, 15 − 17 charge transport-induced dissociation is inevitable.…”

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confidence: 99%

Mechanical Stabilization of Nanoscale Conductors by Plasmon Oscillations

2020

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External driving of the Fermion reservoirs interacting with a nanoscale charge-conductor is shown to enhance its mechanical stability during resonant tunneling. This counterintuitive cooling effect is predicted despite the net energy flow into the device. Field-induced plasmon oscillations stir the energy distribution of charge carriers near the reservoir’s chemical potentials into a nonequilibrium state with favored transport of low-energy electrons. Consequently, excess heating of mechanical degrees of freedom in the conductor is suppressed. We demonstrate and analyze this effect for a generic model of mechanical instability in nanoelectronic devices, covering a broad range of parameters. Plasmon-induced stabilization is suggested as a feasible strategy to confront a major problem of current-induced heating and breakdown of nanoscale systems operating far from equilibrium.

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confidence: 99%

Mechanical Stabilization of Nanoscale Conductors by Plasmon Oscillations

2020

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“…The efficiency of electron-hole pair creation processes depends sensitively on the applied bias voltage. 35,36,102 As shown previously, 38,103 cooling due to electron-hole pair creation processes is particularly effective at the onset of resonant transport, but becomes successively blocked for larger voltages. As a consequence, the dissociation rate is significantly reduced with decreasing bias voltage, where pair creation processes become less suppressed.…”

Section: Intermediate Bias Voltage Regimementioning

confidence: 70%

Unraveling current-induced dissociation mechanisms in single-molecule junctions

Ke,

Erpenbeck,

Peskin

et al. 2021

Preprint

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Understanding current-induced bond rupture in single-molecule junctions is both of fundamental interest and a prerequisite for the design of molecular junctions, which are stable at higher bias voltages. In this work, we use a fully quantum mechanical method based on the hierarchical quantum master equation approach to analyze the dissociation mechanisms in molecular junctions. Considering a wide range of transport regimes, from off-resonant to resonant, non-adiabatic to adiabatic transport, and weak to strong vibronic coupling, our systematic study identifies three dissociation mechanisms. In the weak and intermediate vibronic coupling regime, the dominant dissociation mechanism is stepwise vibrational ladder climbing. For strong vibronic coupling, dissociation is induced via multi-quantum vibrational excitations triggered either by a single electronic transition at high bias voltages or by multiple electronic transitions at low biases. Furthermore, the influence of vibrational relaxation on the dissociation dynamics is analyzed and strategies for improving the stability of molecular junctions are discussed.Recently, we have developed a fully quantum mechanical theoretical framework to study current-induced bond rupture in molecular junctions, which takes proper

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“…46 is zero bias quasiparticle limit of present formulation with focus on incoming flux and neglect of selfconsistency in treatment of light-matter interaction (see Appendix B for details). In the case of quantum treatment of radiation field, the latter assumption is known to violate conservation laws [56,57] and may lead to qualitative failures [58]. Thus, it is not applicable in optical studies of open quantum systems [59].…”

Section: Floquet Formulation For the Negf-scbamentioning

confidence: 99%

Optical properties of periodically driven open nonequilibrium quantum systems

Cabra

Franco

Galperin

2020

The Journal of Chemical Physics

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Characterization and control of matter by optical means is at the forefront of research both due to fundamental insights and technological promise. Theoretical modeling of periodically driven systems is a preprequisite to understanding and engineering nanoscale quantum devices for quantum technologies. Here, we develop a theory for transport and optical response of molecular junctions, open nonequilibrium quantum systems, under external periodic driving. Periodic driving is described using the Floquet theory combined with nonequilibrium Green's function description of the system. Light-matter interaction is modeled employing the self-consistent Born approximation. Generic three-level model is utilized to illustrate effect of the driving on optical and transport properties of junctions.arXiv:2001.03675v1 [cond-mat.mes-hall]

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Kinetic Schemes in Open Interacting Systems

Cited by 17 publications

References 43 publications

Mechanical Stabilization of Nanoscale Conductors by Plasmon Oscillations

Mechanical Stabilization of Nanoscale Conductors by Plasmon Oscillations

Unraveling current-induced dissociation mechanisms in single-molecule junctions

Optical properties of periodically driven open nonequilibrium quantum systems

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