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Title
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Finite-temperature Wigner solid and other phases of ripplonic polarons on a helium film
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Author
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Abstract
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| Electrons on liquid helium can form different phases depending on density, and temperature. Also the electron-ripplon coupling strength influences the phase diagram, through the formation of so-called "ripplonic polarons", that change how electrons are localized, and that shifts the transition between the Wigner solid and the liquid phase. We use an all-coupling, finite-temperature variational method to study the formation of a ripplopolaron Wigner solid on a liquid helium film for different regimes of the electron-ripplon coupling strength. In addition to the three known phases of the ripplopolaron system (electron Wigner solid, polaron Wigner solid, and electron fluid), we define and identify a fourth distinct phase, the ripplopolaron liquid. We analyse the transitions between these four phases and calculate the corresponding phase diagrams. This reveals a reentrant melting of the electron solid as a function of temperature. The calculated regions of existence of the Wigner solid are in agreement with recent experimental data. |
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Language
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English
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Source (journal)
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European physical journal : B : condensed matter and complex systems. - Berlin
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Publication
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Berlin
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2016
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ISSN
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1434-6028
[print]
1434-6036
[online]
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DOI
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10.1140/EPJB/E2016-70149-8
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Volume/pages
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89
:8
(2016)
, 11 p.
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Article Reference
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172
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ISI
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000391225200001
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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