Mutual friction in superfluid He- B 3 in the low-temperature regime

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Mäkinen, J. T. Eltsov, V. B. 2018-08-01T12:41:41Z 2018-08-01T12:41:41Z 2018-01-29
dc.identifier.citation Mäkinen , J T & Eltsov , V B 2018 , ' Mutual friction in superfluid He- B 3 in the low-temperature regime ' Physical Review B , vol 97 , no. 1 , 014527 , pp. 1-7 . DOI: 10.1103/PhysRevB.97.014527 en
dc.identifier.issn 2469-9950
dc.identifier.issn 1550-235X
dc.identifier.other PURE UUID: 474f2cc4-0648-49bc-baac-390347f5157d
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE LINK:
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dc.description.abstract We measure the response of a rotating sample of superfluid He-B3 to spin-down to rest in the zero-temperature limit. Deviations from perfect cylindrical symmetry in the flow environment cause the initial response to become turbulent. The remaining high polarization of vortices along the rotation axis suppresses the turbulent behavior and leads to laminar late-time response. We determine the dissipation during laminar decay at (0.13-0.22)Tc from the precession frequency of the remnant vortex cluster. We extract the mutual friction parameter α and confirm that its dependence on temperature and pressure agrees with theoretical predictions. We find that the zero-temperature extrapolation of α has pressure-independent value α(T=0)∼5×10-4, which we attribute to a process where Kelvin waves, excited at surfaces of the container, propagate into the bulk and enhance energy dissipation via overheating vortex core-bound fermions. en
dc.format.extent 1-7
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries Physical Review B en
dc.relation.ispartofseries Volume 97, issue 1 en
dc.rights openAccess en
dc.subject.other Electronic, Optical and Magnetic Materials en
dc.subject.other Condensed Matter Physics en
dc.subject.other 114 Physical sciences en
dc.title Mutual friction in superfluid He- B 3 in the low-temperature regime en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department ROTA – Topological superfluids
dc.contributor.department Department of Applied Physics
dc.subject.keyword Electronic, Optical and Magnetic Materials
dc.subject.keyword Condensed Matter Physics
dc.subject.keyword 114 Physical sciences
dc.identifier.urn URN:NBN:fi:aalto-201808014147
dc.identifier.doi 10.1103/PhysRevB.97.014527
dc.type.version publishedVersion

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