Mixed States of Composite Fermions Carrying Two and Four Vortices

Details Mixed States of Composite Fermions Carrying Two and Four Vortices Mixed States of Composite Fermions Carrying Two and Four Vortices

2000-10-09

arxiv.org/abs/cond-mat/0010134v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Accepted for PRB rapid communication (scheduled to appear in Nov 15, 2000 issue)

Scientific paper

10.1103/PhysRevB.62.R13274

There now exists preliminary experimental evidence for some fractions, such as $\nu$ = 4/11 and 5/13, that do not belong to any of the sequences $\nu=n/(2pn\pm 1)$, $p$ and $n$ being integers. We propose that these states are mixed states of composite fermions of different flavors, for example, composite fermions carrying two and four vortices. We also obtain an estimate of the lowest-excitation dispersion curve as well as the transport gap; the gaps for 4/11 are smaller than those for 1/3 by approximately a factor of 50.

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