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arxiv: 0912.4831 · v1 · pith:U3BIVRAOnew · submitted 2009-12-24 · ❄️ cond-mat.mes-hall

Mesoscopic Fluctuations of Coulomb Drag of Composite Fermions

A. S. Price (1) , A. K. Savchenko (1) , D. A. Ritchie (2) ((1) School of Physics , University of Exeter , Exeter EX4 4QL , UK , (2) Cavendish Laboratory , University of Cambridge
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classification ❄️ cond-mat.mes-hall
keywords fluctuationscompositedragfermionscoulombmesoscopicalternatingaverage
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We present the first experimental study 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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