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Maryenko D, McCollam A, Falson J, Kozuka Y, Bruin J, Zeitler U, Kawasaki M. Composite fermion liquid to Wigner solid transition in the lowest Landau level of zinc oxide. Nat Commun 2018; 9:4356. [PMID: 30341295 PMCID: PMC6195604 DOI: 10.1038/s41467-018-06834-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 09/27/2018] [Indexed: 12/05/2022] Open
Abstract
Interactions between the constituents of a condensed matter system can drive it through a plethora of different phases due to many-body effects. A prominent platform for it is a dilute two-dimensional electron system in a magnetic field, which evolves intricately through various gaseous, liquid and solid phases governed by Coulomb interaction. Here we report on the experimental observation of a phase transition between the composite fermion liquid and adjacent magnetic field induced phase with a character of Wigner solid. The experiments are performed in the lowest Landau level of a MgZnO/ZnO two-dimensional electron system with attributes of both a liquid and a solid. An in-plane magnetic field component applied on top of the perpendicular magnetic field extends the Wigner-like phase further into the composite fermion liquid phase region. Our observations indicate the direct competition between a composite fermion liquid and a Wigner solid formed either by electrons or composite fermions. In two-dimensional electron systems, strong Coulomb interactions lead to the formation of new phases. Here the authors observe a transition between two of these correlated phases, a composite fermion liquid and Wigner solid, in a zinc oxide heterostructure.
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Affiliation(s)
- D Maryenko
- RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan.
| | - A McCollam
- High Field Magnet Laboratory (HFML-EMFL) and Institute for Molecules and Materials, Radboud University, 6525 ED, Nijmegen, The Netherlands
| | - J Falson
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Tokyo, 113-8656, Japan.,Max Planck Institute for Solid State Research, Stuttgart, Germany
| | - Y Kozuka
- Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Tokyo, 113-8656, Japan.,National Institute for Materials Science, Tsukuba, Ibaraki, Japan
| | - J Bruin
- High Field Magnet Laboratory (HFML-EMFL) and Institute for Molecules and Materials, Radboud University, 6525 ED, Nijmegen, The Netherlands.,Max Planck Institute for Solid State Research, Stuttgart, Germany
| | - U Zeitler
- High Field Magnet Laboratory (HFML-EMFL) and Institute for Molecules and Materials, Radboud University, 6525 ED, Nijmegen, The Netherlands
| | - M Kawasaki
- RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan.,Department of Applied Physics and Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Tokyo, 113-8656, Japan
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