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- W3135316775 abstract "What is the fate of the ground state of a two-dimensional electron system at very low Landau level filling factors (ν) where interaction reigns supreme? An ordered array of electrons, the so-called Wigner crystal, has long been believed to be the answer. It was in fact the search for the elusive Wigner crystal that led to the discovery of an unexpected, incompressible liquid state, namely the fractional quantum Hall state at ν=1/3. Understanding the competition between the liquid and solid ground states has since remained an active field of fundamental research. Here we report experimental data for a new two-dimensional system where the electrons are confined to an AlAs quantum well. The exceptionally high quality of the samples and the large electron effective mass allow us to determine the liquid-solid phase diagram for the two-dimensional electrons in a large range of filling factors near ≃1/3 and ≃1/5. The data and their comparison with an available theoretical phase diagram reveal the crucial role of Landau level mixing and finite electron layer thickness in determining the prevailing ground states.Received 26 October 2020Accepted 6 January 2021DOI:https://doi.org/10.1103/PhysRevResearch.3.013181Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.Published by the American Physical SocietyPhysics Subject Headings (PhySH)Research AreasAnyonsCharge density wavesEdge statesElectrical conductivityExotic phases of matterFractionalizationHall effectLandau levelsPhase diagramsTopological materialsPhysical SystemsTwo-dimensional electron systemTechniquesDilution refrigeratorResistivity measurementsCondensed Matter, Materials & Applied Physics" @default.
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- W3135316775 date "2021-02-25" @default.
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- W3135316775 title "Competition between fractional quantum Hall liquid and Wigner solid at small fillings: Role of layer thickness and Landau level mixing" @default.
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