Phonon-Assisted Current Noise in Molecular Junctions

Federica Haupt, Tomáš Novotný, and Wolfgang Belzig
Phys. Rev. Lett. 103, 136601 – Published 22 September 2009

Abstract

We investigate the effects of phonon scattering on the electronic current noise through nanojunctions using the nonequilibrium Green’s functions formalism extended to include the counting field. In the case of weak electron-phonon coupling and a single broad electronic level, we derive an analytic expression for the current noise at arbitrary temperature and identify physically distinct contributions based on their voltage dependence. We apply our theory to the experimentally relevant case of a D2 molecule placed in a break junction and predict a significant inelastic contribution to the current noise.

  • Figure
  • Figure
  • Figure
  • Received 12 March 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.136601

©2009 American Physical Society

Authors & Affiliations

Federica Haupt1, Tomáš Novotný2, and Wolfgang Belzig1

  • 1Fachbereich Physik, Universität Konstanz, D- 78457 Konstanz, Germany
  • 2Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 5, CZ-121 16 Praha 2, Czech Republic

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 103, Iss. 13 — 25 September 2009

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×