DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Eunseong | ko |
dc.contributor.author | Chan, MHW | ko |
dc.date.accessioned | 2013-03-04T19:18:48Z | - |
dc.date.available | 2013-03-04T19:18:48Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2004-01 | - |
dc.identifier.citation | NATURE, v.427, no.6971, pp.225 - 227 | - |
dc.identifier.issn | 0028-0836 | - |
dc.identifier.uri | http://hdl.handle.net/10203/83807 | - |
dc.description.abstract | When liquid He-4 is cooled below 2.176 K, it undergoes a phase transition-Bose-Einstein condensation-and becomes a superfluid with zero viscosity(1). Once in such a state, it can flow without dissipation even through pores of atomic dimensions. Although it is intuitive to associate superflow only with the liquid phase(2), it has been proposed theoretically(3-5) that superflow can also occur in the solid phase of He-4. Owing to quantum mechanical fluctuations, delocalized vacancies and defects are expected to be present in crystalline solid He-4, even in the limit of zero temperature. These zero-point vacancies can in principle allow the appearance of superfluidity in the solid(3,4). However, in spite of many attempts(6), such a 'supersolid' phase has yet to be observed in bulk solid He-4. Here we report torsional oscillator measurements on solid helium confined in a porous medium, a configuration that is likely to be more heavily populated with vacancies than bulk helium. We find an abrupt drop in the rotational inertia(5) of the confined solid below a certain critical temperature. The most likely interpretation of the inertia drop is entry into the supersolid phase. If confirmed, our results show that all three states of matter-gas(7), liquid(1) and solid-can undergo Bose Einstein condensation. | - |
dc.language | English | - |
dc.publisher | NATURE PUBLISHING GROUP | - |
dc.subject | BOSE-EINSTEIN CONDENSATION | - |
dc.subject | POROUS VYCOR GLASS | - |
dc.subject | CONFINED GEOMETRIES | - |
dc.subject | HE-4 FILMS | - |
dc.subject | SOLIDIFICATION | - |
dc.subject | SUPERFLUIDITY | - |
dc.subject | TRANSITION | - |
dc.title | Probable observation of a supersolid helium phase | - |
dc.type | Article | - |
dc.identifier.wosid | 000188068100037 | - |
dc.identifier.scopusid | 2-s2.0-1642430688 | - |
dc.type.rims | ART | - |
dc.citation.volume | 427 | - |
dc.citation.issue | 6971 | - |
dc.citation.beginningpage | 225 | - |
dc.citation.endingpage | 227 | - |
dc.citation.publicationname | NATURE | - |
dc.identifier.doi | 10.1038/nature02220 | - |
dc.contributor.localauthor | Kim, Eunseong | - |
dc.contributor.nonIdAuthor | Chan, MHW | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | BOSE-EINSTEIN CONDENSATION | - |
dc.subject.keywordPlus | POROUS VYCOR GLASS | - |
dc.subject.keywordPlus | CONFINED GEOMETRIES | - |
dc.subject.keywordPlus | HE-4 FILMS | - |
dc.subject.keywordPlus | SOLIDIFICATION | - |
dc.subject.keywordPlus | SUPERFLUIDITY | - |
dc.subject.keywordPlus | TRANSITION | - |
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