Mesoscopic fluctuations of Coulomb drag of composite fermions

A. S. Price, A. K. Savchenko, and D. A. Ritchie
Phys. Rev. B 81, 193303 – Published 24 May 2010

Abstract

We report the observation of mesoscopic fluctuations of Coulomb drag in a system with two layers of composite fermions, which are seen when either the magnetic field or carrier concentration are varied. These fluctuations cause an alternating sign of the average drag. We study these fluctuations at different temperatures to establish the dominant dephasing mechanism of composite fermions.

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  • Received 24 April 2010

DOI:https://doi.org/10.1103/PhysRevB.81.193303

©2010 American Physical Society

Authors & Affiliations

A. S. Price1, A. K. Savchenko1, and D. A. Ritchie2

  • 1School of Physics, University of Exeter, Exeter EX4 4QL, United Kingdom
  • 2Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3 0HE, United Kingdom

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Issue

Vol. 81, Iss. 19 — 15 May 2010

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