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Composite fermion liquid to Wigner solid transition in the lowest Landau level of zinc oxide.

A new interesting article has been published in Nat Commun. 2018 Oct 19;9(1):4356. doi: 10.1038/s41467-018-06834-6. and titled:

Composite fermion liquid to Wigner solid transition in the lowest Landau level of zinc oxide.

Authors of this article are:

Maryenko D, McCollam A, Falson J, Kozuka Y, Bruin J, Zeitler U, Kawasaki M.

A summary of the article is shown below:

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.

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