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Magnetoresistance of composite fermions at ν=1/2

L. P. Rokhinson·V. J. Goldman
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Abstract

We have studied temperature dependence of both diagonal and Hall resistivity in the vicinity of $ν=1/2$. Magnetoresistance was found to be positive and almost independent of temperature: temperature enters resistivity as a logarithmic correction. At the same time, no measurable corrections to the Hall resistivity has been found. Neither of these results can be explained within the mean-field theory of composite fermions by an analogy with conventional low-field interaction theory. There is an indication that interactions of composite fermions with fluctuations of the gauge field may reconcile the theory and experiment.

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L. P. Rokhinson, V. J. Goldman. 1997-04-05. Magnetoresistance of composite fermions at ν=1/2. https://doi.org/10.1103/physrevb.56.r1672

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