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Type: Artigo de periódico
Title: Dislocation Mobility in a Quantum Crystal: The Case of Solid He-4
Author: Pessoa, R
Vitiello, SA
de Koning, M
Abstract: We investigate the structure and mobility of dislocations in hcp He-4 crystals. In addition to fully characterizing the five elastic constants of this system, we obtain direct insight into dislocation core structures on the basal plane, which demonstrates a tendency toward dissociation into partial dislocations. Moreover, our results suggest that intrinsic lattice resistance is an essential factor in the mobility of these dislocations. This insight sheds new light on the possible correlation between dislocation mobility and the observed macroscopic behavior of crystalline He-4.
Country: EUA
Editor: Amer Physical Soc
Rights: aberto
Identifier DOI: 10.1103/PhysRevLett.104.085301
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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