Dislocation Structure And Mobility In Hcp He 4

dc.date2016
dc.date2016-12-06T17:44:18Z
dc.date2016-12-06T17:44:18Z
dc.date.accessioned2018-03-29T02:01:05Z
dc.date.available2018-03-29T02:01:05Z
dc.identifier
dc.identifierPhysical Review Letters. American Physical Society, v. 117, p. , 2016.
dc.identifier00319007
dc.identifier10.1103/PhysRevLett.117.045301
dc.identifierhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84979236436&partnerID=40&md5=73e7da4759674cc352d7e31e90ccd26a
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/319540
dc.identifier2-s2.0-84979236436
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1310308
dc.descriptionUsing path-integral Monte Carlo simulations, we assess the core structure and mobility of the screw and edge basal-plane dislocations in hcp He4. Our findings provide key insights into recent interpretations of giant plasticity and mass flow junction experiments. First, both dislocations are dissociated into nonsuperfluid Shockley partial dislocations separated by ribbons of stacking fault, suggesting that they are unlikely to act as one-dimensional channels that may display Lüttinger-liquid-like behavior. Second, the centroid positions of the partial cores are found to fluctuate substantially, even in the absence of applied shear stresses. This implies that the lattice resistance to motion of the partial dislocations is negligible, consistent with the recent experimental observations of giant plasticity. Further results indicate that both the structure of the partial cores and the zero-point fluctuations play a role in this extreme mobility. © 2016 American Physical Society.
dc.description117
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dc.languageen
dc.publisherAmerican Physical Society
dc.relationPhysical Review Letters
dc.rightsaberto
dc.sourceScopus
dc.titleDislocation Structure And Mobility In Hcp He 4
dc.typeArtículos de revistas


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