Density Dependence of the Phases of the v = 1 Integer Quantum Hall Plateau in Low Disorder Electron Gases

Huang, Haoyun; Hussain, Waseem; Myers, Sean A.; Pfeiffer, Loren N.; West, Ken W.; Baldwin, Kirk W.; Csáthy, Gábor A.

doi:10.1002/pssr.202400376

Title: Density Dependence of the Phases of the v = 1 Integer Quantum Hall Plateau in Low Disorder Electron Gases

Journal Article · 23 December 2024 · Physica Status Solidi. Rapid Research Letters

DOI: https://doi.org/10.1002/pssr.202400376 · OSTI ID:2483694

Huang, Haoyun ^[1]; Hussain, Waseem ^[1]; Myers, Sean A. ^[1]; Pfeiffer, Loren N. ^[2]; West, Ken W. ^[2]; Baldwin, Kirk W. ^[2];

^[1]

Purdue University, West Lafayette, IN (United States)
Princeton University, NJ (United States)

Recent magnetotransport measurements in low-disorder electron systems confined to GaAs/AlGaAs samples reveal that the v = 1 integer quantum Hall plateau is broken into three distinct regions. These three regions are associated with two phases with different types of bulk localization: the Anderson insulator is due to random quasiparticle localization, and the integer quantum Hall Wigner solid is due to pinning of a stiff quasiparticle lattice. Universal properties of the v = 1 plateau are highlighted: the structure of the stability diagram, the nonmonotonic dependence of the activation energy on the filling factor, and the alignment of features of the activation energy with features of the stability regions of the different phases are found to be similar in three samples spanning a wide range of electron densities. Quantitative differences between the samples are also discussed, such as the dependence of the onset temperature and the activation energy of the integer quantum Hall Wigner solid on the electron density. The findings provide insights into the localization behavior along the v = 1 integer quantum Hall plateau in the low disorder regime.

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Research Organization:: Purdue University, West Lafayette, IN (United States)

Sponsoring Organization:: Gordon and Betty Moore Foundation's EPiQS Initiative; USDOE

Grant/Contract Number:: SC0006671

OSTI ID:: 2483694

Journal Information:: Physica Status Solidi. Rapid Research Letters, Journal Name: Physica Status Solidi. Rapid Research Letters Journal Issue: 5 Vol. 19; ISSN 1862-6254; ISSN 1862-6270

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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