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Zhelev N, Abhilash TS, Smith EN, et al. The A-B transition in superfluid helium-3 under confinement in a thin slab geometry. Nat Commun. 2017;8:15963doi: 10.1038/ncomms15963.
Zhelev, N., Abhilash, T. S., Smith, E. N., Bennett, R. G., Rojas, X., Levitin, L., Saunders, J., & Parpia, J. M. (2017). The A-B transition in superfluid helium-3 under confinement in a thin slab geometry. Nature communications, 815963. https://doi.org/10.1038/ncomms15963
Zhelev, N, et al. "The A-B transition in superfluid helium-3 under confinement in a thin slab geometry." Nature communications vol. 8 (2017): 15963. doi: https://doi.org/10.1038/ncomms15963
Zhelev N, Abhilash TS, Smith EN, Bennett RG, Rojas X, Levitin L, Saunders J, Parpia JM. The A-B transition in superfluid helium-3 under confinement in a thin slab geometry. Nat Commun. 2017 Jul 03;8:15963. doi: 10.1038/ncomms15963. PMID: 28671184; PMCID: PMC5500879.
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Nat Commun. 2017 Jul 03;8:15963. doi: 10.1038/ncomms15963.

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

Nature communications

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

Affiliations

  1. Department of Physics, Cornell University, Ithaca, New York 14853, USA.
  2. Department of Physics, Royal Holloway University of London, Egham, Surrey TW20 0EX, UK.

PMID: 28671184 PMCID: PMC5500879 DOI: 10.1038/ncomms15963

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.

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