Evidence for single-vortex pinning and unpinning events in superfluid 4He

P. Hakonen*, O. Avenel, E. Varoquaux

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

14 Citations (Scopus)
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We have observed two critical velocity levels for phase slips in superfluid 4He at temperatures between 14 and 44 mK, due to microparticles formed in the cell at low temperature. We interpret these observations as evidence for pinning and unpinning events of single vortices of nanometric size. From a study of the lifetime and unpinning velocities of the pinned vortices, we are led to conclude that unpinning takes place by quantum tunneling.

Original languageEnglish
Pages (from-to)3451-3454
Number of pages4
JournalPhysical Review Letters
Issue number16
Publication statusPublished - 19 Oct 1998
MoE publication typeA1 Journal article-refereed

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