Full counting statistics and shot noise of cotunneling in quantum dots and single-molecule transistors

Kaasbjerg, Kristen; Belzig, Wolfgang

Full counting statistics and shot noise of cotunneling in quantum dots and single-molecule transistors

Dateien

Kaasbjerg_0-293336.pdfGröße: 930.43 KBDownloads: 330

Datum

2015

Autor:innen

Kaasbjerg, Kristen

Belzig, Wolfgang

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review B. 2015, 91(23), 235413. ISSN 0163-1829. eISSN 1095-3795. Available under: doi: 10.1103/PhysRevB.91.235413

Zusammenfassung

We develop a conceptually simple scheme based on a master-equation approach to evaluate the full-counting statistics (FCS) of elastic and inelastic off-resonant tunneling (cotunneling) in quantum dots (QDs) and molecules. We demonstrate the method by showing that it reproduces known results for the FCS and shot noise in the cotunneling regime. For a QD with an excited state, we obtain an analytic expression for the cumulant generating function (CGF) taking into account elastic and inelastic cotunneling. From the CGF we find that the shot noise above the inelastic threshold in the cotunneling regime is inherently super-Poissonian when external relaxation is weak. Furthermore, a complete picture of the shot noise across the different transport regimes is given. In the case where the excited state is a blocking state, strongly enhanced shot noise is predicted both in the resonant and cotunneling regimes.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

KAASBJERG, Kristen, Wolfgang BELZIG, 2015. Full counting statistics and shot noise of cotunneling in quantum dots and single-molecule transistors. In: Physical Review B. 2015, 91(23), 235413. ISSN 0163-1829. eISSN 1095-3795. Available under: doi: 10.1103/PhysRevB.91.235413

BibTex

@article{Kaasbjerg2015count-31132,
  year={2015},
  doi={10.1103/PhysRevB.91.235413},
  title={Full counting statistics and shot noise of cotunneling in quantum dots and single-molecule transistors},
  url={http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.235413},
  number={23},
  volume={91},
  issn={0163-1829},
  journal={Physical Review B},
  author={Kaasbjerg, Kristen and Belzig, Wolfgang},
  note={Article Number: 235413}
}

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URL der Originalveröffentl.

http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.235413

Prüfdatum der URL

2015-06-11

Universitätsbibliographie

Ja