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Open Quantum Systems Decoherence

From quantum Hall ferromagnetism to huge longitudinal resistance at the 2/3 fractional quantum Hall state.

PubMed
Authors: Kraus S, Stern O, Lok JG, Dietsche W, Von Klitzing K, Bichler M, Schuh D, Wegscheider W

Year

2002

Paper ID

13077

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

98

Citations

66

Abstract

We observe the transition from a spin-unpolarized to a polarized nu=2/3 fractional quantum Hall state at low currents (<5 nA), recently described in terms of quantum Hall ferromagnetism, versus density and parallel magnetic field. At larger currents the time and current dependent huge longitudinal resistance (HLR) is always initiated at the transition. Transport in the HLR regime is linear and the amount of current-induced nuclear polarization in the HLR is comparable to the thermal nuclear polarization at approximately 20 mK and 10 T. A current-induced disorder in the nuclear polarization is speculated to cause the enhanced resistance in the HLR regime.

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  • This paper contributes to the Open Quantum Systems & Decoherence research area in the Quantum Articles archive.
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  • We observe the transition from a spin-unpolarized to a polarized nu=2/3 fractional quantum Hall state at low currents (

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References & Citation Signals

[1] DOI https://doi.org/10.1103/PhysRevLett.89.266801 [2] Publisher https://pubmed.ncbi.nlm.nih.gov/12484846/

Local Citation Graph (Related-Paper Links)

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External citation index: OpenAlex citation signal • updated 2026-06-13 03:41:51

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