A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Electronic transport in molecular junctions : The generalized Kadanoff–Baym ansatz with initial contact and correlations (2021)


Tuovinen, R., van Leeuwen, R., Perfetto, E., & Stefanucci, G. (2021). Electronic transport in molecular junctions : The generalized Kadanoff–Baym ansatz with initial contact and correlations. Journal of Chemical Physics, 154(9), Article 094104. https://doi.org/10.1063/5.0040685


JYU-tekijät tai -toimittajat


Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajatTuovinen, Riku; van Leeuwen, Robert; Perfetto, Enrico; Stefanucci, Gianluca

Lehti tai sarjaJournal of Chemical Physics

ISSN0021-9606

eISSN1089-7690

Julkaisuvuosi2021

Ilmestymispäivä07.03.2021

Volyymi154

Lehden numero9

Artikkelinumero094104

KustantajaAIP Publishing

JulkaisumaaYhdysvallat (USA)

Julkaisun kielienglanti

DOIhttps://doi.org/10.1063/5.0040685

Julkaisun avoin saatavuusEi avoin

Julkaisukanavan avoin saatavuus

Julkaisu on rinnakkaistallennettu (JYX)https://jyx.jyu.fi/handle/123456789/80376

Rinnakkaistallenteen verkko-osoite (pre-print)https://arxiv.org/abs/2012.08247


Tiivistelmä

The generalized Kadanoff–Baym ansatz (GKBA) offers a computationally inexpensive approach to simulate out-of-equilibrium quantum systems within the framework of nonequilibrium Green’s functions. For finite systems, the limitation of neglecting initial correlations in the conventional GKBA approach has recently been overcome [Karlsson et al., Phys. Rev. B 98, 115148 (2018)]. However, in the context of quantum transport, the contacted nature of the initial state, i.e., a junction connected to bulk leads, requires a further extension of the GKBA approach. In this work, we lay down a GKBA scheme that includes initial correlations in a partition-free setting. In practice, this means that the equilibration of the initially correlated and contacted molecular junction can be separated from the real-time evolution. The information about the contacted initial state is included in the out-of-equilibrium calculation via explicit evaluation of the memory integral for the embedding self-energy, which can be performed without affecting the computational scaling with the simulation time and system size. We demonstrate the developed method in carbon-based molecular junctions, where we study the role of electron correlations in transient current signatures.


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Liittyvät organisaatiot

JYU-yksiköt:


OKM-raportointiKyllä

Raportointivuosi2021

JUFO-taso1


Viimeisin päivitys 2024-10-03 klo 20:15