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Charge metastability and hysteresis in the quantum Hall regime

Pollanen, J. and Eisenstein, J. P. and Pfeiffer, L. N. and West, K. W. (2016) Charge metastability and hysteresis in the quantum Hall regime. Physical Review B, 94 (24). Art. No. 245440. ISSN 2469-9950. doi:10.1103/PhysRevB.94.245440.

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We report simultaneous quasi-dc magnetotransport and high-frequency surface acoustic wave measurements on bilayer two-dimensional electron systems in GaAs. Near strong integer quantized Hall states, a strong magnetic-field-sweep hysteresis in the velocity of the acoustic waves is observed at low temperatures. This hysteresis indicates the presence of a metastable state with anomalously high conductivity in the interior of the sample. This nonequilibrium state is not revealed by conventional low-frequency transport measurements which are dominated by dissipationless transport at the edge of the two-dimensional system. We find that a field-cooling technique allows the equilibrium charge configuration within the interior of the sample to be established. A simple model for this behavior is discussed.

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Additional Information:© 2016 American Physical Society. (Received 7 October 2016; published 29 December 2016) We thank E. H. Fradkin, B. I. Halperin, H. R. Krishnamurthy, M. Shayegan, S. H. Simon, J. C. W. Song, and A. Stern for discussions. The Caltech portion of this work was supported by NSF Grant No. DMR-0070890, DOE Grant No. FG02-99ER45766, and the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center with support of the Gordon and Betty Moore Foundation through Grant No. GBMF1250. The work at Princeton University was funded by the Gordon and Betty Moore Foundation through the EPiQS initiative Grant No. GBMF4420, and by the National Science Foundation MRSEC Grant No. DMR-1420541.
Group:Institute for Quantum Information and Matter
Funding AgencyGrant Number
Department of Energy (DOE)FG02-99ER45766
Institute for Quantum Information and Matter (IQIM)UNSPECIFIED
Gordon and Betty Moore FoundationGBMF1250
Gordon and Betty Moore FoundationGBMF2719
Issue or Number:24
Classification Code:PACS numbers: 64.60.My, 73.43.-f, 85.50.-n
Record Number:CaltechAUTHORS:20161206-075018469
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Official Citation:Charge metastability and hysteresis in the quantum Hall regime J. Pollanen, J. P. Eisenstein, L. N. Pfeiffer, and K. W. West Phys. Rev. B 94, 245440
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72582
Deposited By: Ruth Sustaita
Deposited On:06 Dec 2016 19:35
Last Modified:11 Nov 2021 05:03

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