Nonequilibrium phonon backaction on the current noise in atomic-sized junctions

Novotný, Tomáš; Haupt, Federica; Belzig, Wolfgang

Nonequilibrium phonon backaction on the current noise in atomic-sized junctions

Dateien

Novotny_Nonequilibrium.pdfGröße: 133.03 KBDownloads: 233

Datum

2011

Autor:innen

Novotný, Tomáš

Haupt, Federica

Belzig, Wolfgang

Open Access-Veröffentlichung

Open Access Green

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review B. 2011, 84(11). ISSN 1098-0121. Available under: doi: 10.1103/PhysRevB.84.113107

Zusammenfassung

We study backaction effects of phonon heating due to tunneling electrons on the current noise in atomic-sized junctions. Deriving a generalized kinetic approximation within the extended Keldysh Green’s functions technique, we demonstrate the existence of a characteristic backaction contribution to the noise in case of low external phonon damping. We provide a physically intuitive interpretation of this contribution at large voltage in terms of slow fluctuations of the phonon occupation and show that it generally gives a significant correction to the noise above the phonon emission threshold.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

NOVOTNÝ, Tomáš, Federica HAUPT, Wolfgang BELZIG, 2011. Nonequilibrium phonon backaction on the current noise in atomic-sized junctions. In: Physical Review B. 2011, 84(11). ISSN 1098-0121. Available under: doi: 10.1103/PhysRevB.84.113107

BibTex

@article{Novotny2011Noneq-16161,
  year={2011},
  doi={10.1103/PhysRevB.84.113107},
  title={Nonequilibrium phonon backaction on the current noise in atomic-sized junctions},
  number={11},
  volume={84},
  issn={1098-0121},
  journal={Physical Review B},
  author={Novotný, Tomáš and Haupt, Federica and Belzig, Wolfgang}
}

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