Quantum melting of a two-dimensional Wigner crystal

V.T. Dolgopolov
Osipyan Institute of Solid State Physics, Russian Academy of Sciences, Akademika Osip'yana str. 2, Chernogolovka, Moscow Region, 142432, Russian Federation

The paper reviews theoretical predictions for the behavior of two-dimensional low-density electron systems at near absolute zero temperatures, including the formation of an electron (Wigner) crystal, crystal melting at a critical electron density, and transitions between crystal modifications in more complex (for example, two-layer) systems. The paper presents experimental results obtained from real two-dimensional systems in which the non-conducting (solid) state of the electronic system with indications of collective localization is actually realized. Experimental methods for detecting a quantum liquid-solid phase interface are discussed.

Keywords: two-dimensional electron system, Wigner crystal, electrons in semiconductors
PACS: 68.65.Pq, 71.10.Hf, 73.20.Qt (all)
DOI: 10.3367/UFNe.2017.01.038051
URL: https://ufn.ru/en/articles/2017/7/e/
Web of Science

000412937700005
Scopus

2-s2.0-85031823843
ADS NASA

2017PhyU...60..731D
Citation: Dolgopolov V T "Quantum melting of a two-dimensional Wigner crystal" Phys. Usp. 60 731–742 (2017)

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Received: 26th, September 2016, revised: 20th, December 2016, accepted: 17th, January 2017

Оригинал: Долгополов В Т «Квантовое плавление двумерного вигнеровского кристалла» УФН 187 785–797 (2017); DOI: 10.3367/UFNr.2017.01.038051

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