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

G. A. Csathy·D. C. Tsui·L. N. Pfeiffer·K. W. West
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Abstract

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, $ν=1/3$ fractional quantum Hall liquid, and insulating phases. In both of the insulating phases in the vicinity of the $ν=1/3$ 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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G. A. Csathy, D. C. Tsui, L. N. Pfeiffer, K. W. West. 2004-03-04. Possible observation of phase coexistence of the $ν=1/3$ fractional quantum Hall liquid and a solid. https://doi.org/10.1103/physrevlett.92.256804

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