Quantum criticality, particle-hole symmetry, and duality of the plateau-insulator transition in the quantum Hall regime

Solid State Comm. 137 (2006) 540-544. We report new experimental data on the plateau-insulator transition in the quantum Hall regime, taken from a low mobility InGaAs/InP heterostructure. By employing the fundamental symmetries of the quantum transport problem we are able to disentangle the universa...

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Hauptverfasser:	Pruisken, A. M. M, de Lang, D. T. N, Ponomarenko, L. A, de Visser, A
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Sprache:	eng
Schlagworte:	Physics - Mesoscale and Nanoscale Physics Physics - Strongly Correlated Electrons
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creator	Pruisken, A. M. M de Lang, D. T. N Ponomarenko, L. A de Visser, A
description	Solid State Comm. 137 (2006) 540-544. We report new experimental data on the plateau-insulator transition in the quantum Hall regime, taken from a low mobility InGaAs/InP heterostructure. By employing the fundamental symmetries of the quantum transport problem we are able to disentangle the universal quantum critical aspects of the magnetoresistance data (critical indices and scaling functions) and the sample dependent aspects due to macroscopic inhomogeneities. Our new results and methodology indicate that the previously established experimental value for the critical index (kappa = 0.42) resulted from an admixture of both universal and sample dependent behavior. A novel, non-Fermi liquid value is found (kappa = 0.57) along with the leading corrections to scaling. The statement of self-duality under the Chern Simons flux attachment transformation is verified.
doi_str_mv	10.48550/arxiv.cond-mat/0109043
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M ; de Lang, D. T. N ; Ponomarenko, L. A ; de Visser, A</creatorcontrib><description>Solid State Comm. 137 (2006) 540-544. We report new experimental data on the plateau-insulator transition in the quantum Hall regime, taken from a low mobility InGaAs/InP heterostructure. By employing the fundamental symmetries of the quantum transport problem we are able to disentangle the universal quantum critical aspects of the magnetoresistance data (critical indices and scaling functions) and the sample dependent aspects due to macroscopic inhomogeneities. Our new results and methodology indicate that the previously established experimental value for the critical index (kappa = 0.42) resulted from an admixture of both universal and sample dependent behavior. A novel, non-Fermi liquid value is found (kappa = 0.57) along with the leading corrections to scaling. 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By employing the fundamental symmetries of the quantum transport problem we are able to disentangle the universal quantum critical aspects of the magnetoresistance data (critical indices and scaling functions) and the sample dependent aspects due to macroscopic inhomogeneities. Our new results and methodology indicate that the previously established experimental value for the critical index (kappa = 0.42) resulted from an admixture of both universal and sample dependent behavior. A novel, non-Fermi liquid value is found (kappa = 0.57) along with the leading corrections to scaling. The statement of self-duality under the Chern Simons flux attachment transformation is verified.</abstract><doi>10.48550/arxiv.cond-mat/0109043</doi><oa>free_for_read</oa></addata></record>
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title	Quantum criticality, particle-hole symmetry, and duality of the plateau-insulator transition in the quantum Hall regime
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