Sub-Poissonian Shot Noise in Graphene

J. Tworzydło, B. Trauzettel, M. Titov, A. Rycerz, and C. W. J. Beenakker
Phys. Rev. Lett. 96, 246802 – Published 20 June 2006

Abstract

We calculate the mode-dependent transmission probability of massless Dirac fermions through an ideal strip of graphene (length L, width W, no impurities or defects) to obtain the conductance and shot noise as a function of Fermi energy. We find that the minimum conductivity of order e2/h at the Dirac point (when the electron and hole excitations are degenerate) is associated with a maximum of the Fano factor (the ratio of noise power and mean current). For short and wide graphene strips the Fano factor at the Dirac point equals 1/3, 3 times smaller than for a Poisson process. This is the same value as for a disordered metal, which is remarkable since the classical dynamics of the Dirac fermions is ballistic.

  • Figure
  • Figure
  • Figure
  • Received 29 March 2006

DOI:https://doi.org/10.1103/PhysRevLett.96.246802

©2006 American Physical Society

Authors & Affiliations

J. Tworzydło1, B. Trauzettel2, M. Titov3, A. Rycerz2,4, and C. W. J. Beenakker2

  • 1Institute of Theoretical Physics, Warsaw University, Hoża 69, 00-681 Warsaw, Poland
  • 2Instituut-Lorentz, Universiteit Leiden, P.O. Box 9506, 2300 RA Leiden, The Netherlands
  • 3Department of Physics, Konstanz University, D-78457 Konstanz, Germany
  • 4Marian Smoluchowski Institute of Physics, Jagiellonian University, Kraków, Poland

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 96, Iss. 24 — 23 June 2006

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
×