The A-B transition in superfluid helium-3 under confinement in a thin slab geometry

N. Zhelev, T. S. Abhilash, E. N. Smith, R. G. Bennett, X. Rojas, L. Levitin, J. Saunders, J. M. Parpia

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

The influence of confinement on the phases of superfluid helium-3 is studied using the torsional pendulum method. We focus on the transition between the A and B phases, where the A phase is stabilized by confinement and a spatially modulated stripe phase is predicted at the A-B phase boundary. Here we discuss results from superfluid helium-3 contained in a single 1.08-μm-thick nanofluidic cavity incorporated into a high-precision torsion pendulum, and map the phase diagram between 0.1 and 5.6 bar. We observe only small supercooling of the A phase, in comparison to bulk or when confined in aerogel, with evidence for a non-monotonic pressure dependence. This suggests that an intrinsic B-phase nucleation mechanism operates under confinement. Both the phase diagram and the relative superfluid fraction of the A and B phases, show that strong coupling is present at all pressures, with implications for the stability of the stripe phase.

Original languageEnglish
Article number15963
JournalNature Communications
Volume8
DOIs
Publication statusPublished - 3 Jul 2017
MoE publication typeA1 Journal article-refereed

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Superfluid helium
Helium
helium isotopes
Pendulums
Phase diagrams
slabs
pendulums
Nanofluidics
Pressure
Supercooling
Aerogels
Geometry
Phase boundaries
geometry
phase diagrams
Torsional stress
Nucleation
aerogels
supercooling
pressure dependence

Cite this

Zhelev, N., Abhilash, T. S., Smith, E. N., Bennett, R. G., Rojas, X., Levitin, L., ... Parpia, J. M. (2017). The A-B transition in superfluid helium-3 under confinement in a thin slab geometry. Nature Communications, 8, [15963]. https://doi.org/10.1038/ncomms15963
Zhelev, N. ; Abhilash, T. S. ; Smith, E. N. ; Bennett, R. G. ; Rojas, X. ; Levitin, L. ; Saunders, J. ; Parpia, J. M. / The A-B transition in superfluid helium-3 under confinement in a thin slab geometry. In: Nature Communications. 2017 ; Vol. 8.
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Zhelev, N, Abhilash, TS, Smith, EN, Bennett, RG, Rojas, X, Levitin, L, Saunders, J & Parpia, JM 2017, 'The A-B transition in superfluid helium-3 under confinement in a thin slab geometry', Nature Communications, vol. 8, 15963. https://doi.org/10.1038/ncomms15963

The A-B transition in superfluid helium-3 under confinement in a thin slab geometry. / Zhelev, N.; Abhilash, T. S.; Smith, E. N.; Bennett, R. G.; Rojas, X.; Levitin, L.; Saunders, J.; Parpia, J. M.

In: Nature Communications, Vol. 8, 15963, 03.07.2017.

Research output: Contribution to journalArticleScientificpeer-review

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