Transient magnetic tunneling mediated by a molecular bridge in the junction region

Kalvová, A.; Špička, Václav; Velický, B.

doi:10.1051/epjconf/20147502004

Cited by 4 publications

(2 citation statements)

References 11 publications

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“…Extensions to the single-level quantum devices have included the spin degree of freedom for the study of spin currents, magnetism and torque [57,[442][443][444][445][446][447], establishing that, e.g., tunneling magnetoresistance may transiently develop negative values, and the electronic interactions may enhance this effect. In this regard, the GKBA reconstruction has been shown to capture the essential features of magnetic tunnel currents [448][449][450][451].…”

Section: Electronic Transportmentioning

confidence: 99%

A many-body approach to transport in quantum systems: from the transient regime to the stationary state

Ridley

Talarico

Karlsson

et al. 2022

J. Phys. A: Math. Theor.

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We review one of the most versatile theoretical approaches to the study of time-dependent correlated quantum transport in nano-systems: the non-equilibrium Green's function (NEGF) formalism. Within this formalism, one can treat, on the same footing, inter-particle interactions, external drives and/or perturbations, and coupling to baths with a (piece-wise) continuum set of degrees of freedom. After a historical overview on the theory of transport in quantum systems, we present a modern introduction of the NEGF approach to quantum transport. We discuss the inclusion of inter-particle interactions using diagrammatic techniques, and the use of the so-called embedding and inbedding techniques which take the bath couplings into account non-perturbatively. In various limits, such as the non-interacting limit and the steady-state limit, we then show how the NEGF formalism elegantly reduces to well-known formulae in quantum transport as special cases. We then discuss non-equilibrium transport in general, for both particle and energy currents. Under the presence of a time-dependent drive -- encompassing pump--probe scenarios as well as driven quantum systems -- we discuss the transient as well as asymptotic behavior, and also how to use NEGF to infer information on the out-of-equilibrium system. As illustrative examples, we consider model systems general enough to pave the way to realistic systems. These examples encompass one- and two-dimensional electronic systems, systems with electron--phonon couplings, topological superconductors, and optically responsive molecular junctions where electron--photon couplings are relevant.

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Section: Electronic Transportmentioning

confidence: 99%

A many-body approach to transport in quantum systems: from the transient regime to the stationary state

Ridley

Talarico

Karlsson

et al. 2022

J. Phys. A: Math. Theor.

View full text Add to dashboard Cite

show abstract

“…Extensions to the single-level quantum devices have included the spin degree of freedom for the study of spin currents, magnetism and torque [57,[398][399][400][401][402][403], establishing that, e.g., tunneling magnetoresistance may transiently develop negative values, and the electronic interactions may enhance this effect. In this regard, the GKBA reconstruction has been shown to capture the essential features of magnetic tunnel currents [404][405][406][407].…”

Section: Electronic Transportmentioning

confidence: 99%

A many-body approach to transport in quantum systems: From the transient regime to the stationary state

Ridley,

Talarico,

Karlsson

et al. 2022

Preprint

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We review one of the most versatile theoretical approaches to the study of time-dependent correlated quantum transport in nano-systems: the non-equilibrium Green's function (NEGF) formalism. Within this formalism, one can treat, on the same footing, inter-particle interactions, external drives and/or perturbations, and coupling to baths with a (piece-wise) continuum set of degrees of freedom. After a historical overview on the theory of transport in quantum systems, we present a modern introduction of the NEGF approach to quantum transport. We discuss the inclusion of inter-particle interactions using diagrammatic techniques, and the use of the so-called embedding and inbedding techniques which take the bath couplings into account non-perturbatively. In various limits, such as the non-interacting limit and the steady-state limit, we then show how the NEGF formalism elegantly reduces to well-known formulae in quantum transport as special cases. We then discuss nonequilibrium transport in general, for both particle and energy currents. Under the presence of a time-dependent drive -encompassing pump-probe scenarios as well as driven quantum systems -we discuss the transient as well as asymptotic behavior, and also how to use NEGF to infer information on the out-of-equilibrium system.As illustrative examples, we consider model systems general enough to pave the way to realistic systems. These examples encompass one-and two-dimensional electronic systems, systems with electron-phonon couplings, topological superconductors, and optically responsive molecular junctions where electron-photon couplings are relevant.

show abstract

Fast corrections to the generalized Kadanoff-Baym ansatz

Kalvová,

Špička,

Velický

et al. 2024

Phys. Rev. B

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Transient magnetic tunneling mediated by a molecular bridge in the junction region

Cited by 4 publications

References 11 publications

A many-body approach to transport in quantum systems: from the transient regime to the stationary state

A many-body approach to transport in quantum systems: from the transient regime to the stationary state

A many-body approach to transport in quantum systems: From the transient regime to the stationary state

Fast corrections to the generalized Kadanoff-Baym ansatz

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