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Anisotropic reduced diffusion in dilute liquid <sup>3</sup>He-<sup>4</sup>He mixture in ordered aerogel

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dc.contributor.author Safiullin K.
dc.contributor.author Kuzmin V.
dc.contributor.author Stanislavovas A.
dc.contributor.author Alakshin E.
dc.contributor.author Klochkov A.
dc.contributor.author Tagirov M.
dc.date.accessioned 2021-02-25T20:35:50Z
dc.date.available 2021-02-25T20:35:50Z
dc.date.issued 2020
dc.identifier.issn 0953-8984
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/161935
dc.description.abstract © 2021 IOP Publishing Ltd. We report on the first observation of 3He diffusion anisotropy in 3He-4He liquid mixture confined in ordered aerogels at 1.5-4.2 K temperatures. The used aerogels are arrays of long Al2O3 parallel 8 nm strands. The possible origins of diffusion anisotropy are considered and the changes of roton properties introduced by parallel aerogel strands are discussed. Among the responsible mechanisms we account for Knudsen diffusion, potential anisotropy of layer mode excitations or of bulklike excitations, and helium vortices. The observed reduced 3He diffusion in aerogels is discussed and suggested to appear due to helium excitations at strong confinement conditions. These observations pave the way for future experiments to gain insight into the crossover regime expected at lower temperatures (below 1 K) for which roton density is lower and 3He collisions with strands play significant role.
dc.relation.ispartofseries Journal of Physics Condensed Matter
dc.subject aerogel
dc.subject anomalous diffusion
dc.subject mixtures of He He 3 4
dc.subject nuclear magnetic resonance
dc.subject superfluidity
dc.title Anisotropic reduced diffusion in dilute liquid <sup>3</sup>He-<sup>4</sup>He mixture in ordered aerogel
dc.type Article
dc.relation.ispartofseries-issue 6
dc.relation.ispartofseries-volume 33
dc.collection Публикации сотрудников КФУ
dc.source.id SCOPUS09538984-2020-33-6-SID85096956298

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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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