Possible observation of phase coexistence of the $ν=1/3$ fractional quantum Hall liquid and a solid

Details Possible observation of phase coexistence of the $ν=1/3$ fractional quantum Hall liquid and a solid Possible observation of phase coexistence of the $ν=1/3$ fractional quantum Hall liquid and a solid

2004-03-04

arxiv.org/abs/cond-mat/0403156v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.92.256804

We have measured the magnetoresistance of a very low density and an extremely high quality two-dimensional hole system. With increasing magnetic field applied perpendicularly to the sample we observe the sequence of insulating, $\nu=1/3$ fractional quantum Hall liquid, and insulating phases. In both of the insulating phases in the vicinity of the $\nu=1/3$ filling the magnetoresistance has an unexpected oscillatory behavior with the magnetic field. These oscillations are not of the Shubnikov-de Haas type and cannot be explained by spin effects. They are most likely the consequence of the formation of a new electronic phase which is intermediate between the correlated Hall liquid and a disorder pinned solid.

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