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.
- Received 24 April 2010
DOI:https://doi.org/10.1103/PhysRevB.81.193303
©2010 American Physical Society