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Transient dynamics in interacting nanojunctions within self-consistent perturbation theory

Souto, R Seoane ; Avriller, R ; Yeyati, A Levy ; Martín-Rodero, A

New journal of physics, 2018-08, Vol.20 (8), p.83039-16 [Periódico revisado por pares]

Bristol: IOP Publishing

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Título:
Transient dynamics in interacting nanojunctions within self-consistent perturbation theory
Autor: Souto, R Seoane ; Avriller, R ; Yeyati, A Levy ; Martín-Rodero, A
Assuntos: Bistability ; Condensed Matter ; dynamical properties ; Electrons ; Green's functions ; interactions at the nanoscale ; Kondo effect ; Mesoscopic Systems and Quantum Hall Effect ; molecular electronics ; nanoelectronics ; non-equilibrium phenomena ; Perturbation methods ; Perturbation theory ; Phonons ; Physics ; Transport properties
É parte de: New journal of physics, 2018-08, Vol.20 (8), p.83039-16
Notas: NJP-108464.R2
Descrição: We present an analysis of the transient electronic and transport properties of a nanojunction in the presence of electron-electron and electron-phonon interactions. We introduce a novel numerical approach which allows for an efficient evaluation of the non-equilibrium Green functions in the time domain. Within this approach we implement different self-consistent diagrammatic approximations in order to analyze the system evolution after a sudden connection to the leads and its convergence to the steady state. These approximations are tested by comparison with available numerically exact results, showing good agreement even for the case of large interaction strength. In addition to its methodological advantages, this approach allows us to study several issues of broad current interest like the build up in time of Kondo correlations and the presence or absence of bistability associated with electron-phonon interactions. We find that, in general, correlation effects tend to remove the possible appearance of charge bistability.
Editor: Bristol: IOP Publishing
Idioma: Inglês

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Transient dynamics in interacting nanojunctions within self-consistent perturbation theory

Souto, R Seoane ; Avriller, R ; Yeyati, A Levy ; Martín-Rodero, A

Bristol: IOP Publishing

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