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Finite-size Berezinskii-Kosterlitz-Thouless transition at grain boundaries in solid He-4 and the role of He-3 impurities (Articolo in rivista)
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- Finite-size Berezinskii-Kosterlitz-Thouless transition at grain boundaries in solid He-4 and the role of He-3 impurities (Articolo in rivista) (literal)
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- 2008-01-01T00:00:00+01:00 (literal)
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- 10.1103/PhysRevLett.101.075301 (literal)
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Sergio Gaudio (1,2); Emmanuele Cappelluti (1,2); Gianluca Rastelli (3); Luciano Pietronero (1,2) (2008)
Finite-size Berezinskii-Kosterlitz-Thouless transition at grain boundaries in solid He-4 and the role of He-3 impurities
in Physical review letters (Print)
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- Sergio Gaudio (1,2); Emmanuele Cappelluti (1,2); Gianluca Rastelli (3); Luciano Pietronero (1,2) (literal)
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Author(s): Gaudio S.; Cappelluti E.; Rastelli G.; et al.
Source: PHYSICAL REVIEW LETTERS Volume: 104 Issue: 4 Article Number: 049602 DOI: 10.1103/PhysRevLett.104.049602 Published: JAN 29 2010 (literal)
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- (1) Dipartimento di Fisica, Università \"La Sapienza\", P.le A. Moro 2, 00185 Rome, Italy
(2) SMC Research Center and ISC, INFM-CNR, v. dei Taurini 19, 00185 Rome, Italy
(3) Laboratoire de Physique et Modélisation des Milieux Condensés, Université Joseph Fourier, CNRS - UMR 5493, BP 166, 38042 Grenoble, France (literal)
- Titolo
- Finite-size Berezinskii-Kosterlitz-Thouless transition at grain boundaries in solid He-4 and the role of He-3 impurities (literal)
- Abstract
- We analyze the complex phenomenology of the nonclassical rotational inertia (NCRI) observed at low temperature in solid He-4 within the context of a two-dimensional Berezinskii-Kosterlitz-Thouless transition in a premelted He-4 film at the grain boundaries. We show that both the temperature and He-3 doping dependence of the NCRI fraction (NCRIF) can be ascribed to finite size effects induced by the finite grain size. We give an estimate of the average size of the grains which we argue to be limited by the isotopic He-3 impurities and we provide a simple power-law relation between the NCRIF and the He-3 concentration. (literal)
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