Photoconductance of organic single-molecule contacts

Viljas, Janne K.; Pauly, Fabian; Cuevas, Juan Carlos

Photoconductance of organic single-molecule contacts

Dateien

viljas_211638.pdfGröße: 224.63 KBDownloads: 193

Datum

2007

Autor:innen

Viljas, Janne K.

Pauly, Fabian

Cuevas, Juan Carlos

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Physik

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Physical Review B. 2007, 76(3). ISSN 1098-0121. eISSN 1550-235X. Available under: doi: 10.1103/PhysRevB.76.033403

Zusammenfassung

We study the dc conductance of organic single-molecule contacts in the presence of external electromagnetic radiation (photoconductance). In agreement with previous predictions, we find that the radiation can lead to large enhancements of the conductance of such contacts by bringing off-resonant levels into resonance through photoassisted processes. In our analysis, we make use of the simplifying fact that, under certain assumptions, the photoconductance can be expressed in terms of the transmission function in the absence of the radiation. The conductance enhancement is demonstrated for oligophenylene molecules between gold electrodes, whose electronic structure is calculated based on density-functional theory. It is shown that the exponential decay of the conductance with the length of the molecule can be replaced by a length-independent value in the presence of radiation.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

VILJAS, Janne K., Fabian PAULY, Juan Carlos CUEVAS, 2007. Photoconductance of organic single-molecule contacts. In: Physical Review B. 2007, 76(3). ISSN 1098-0121. eISSN 1550-235X. Available under: doi: 10.1103/PhysRevB.76.033403

BibTex

@article{Viljas2007Photo-21163,
  year={2007},
  doi={10.1103/PhysRevB.76.033403},
  title={Photoconductance of organic single-molecule contacts},
  number={3},
  volume={76},
  issn={1098-0121},
  journal={Physical Review B},
  author={Viljas, Janne K. and Pauly, Fabian and Cuevas, Juan Carlos}
}

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