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Observation of a new superfluid phase for ³He embedded in nematically ordered aerogel

Author
Zhelev, Nikolay; Reichl, Matthew; Abhilash, Thanniyil Sebastian; Smith, Eric Nelson; Nguyen, Kayla X.-T.; Meuller, Erich J.; Parpia, Jeevak M.
Abstract
In bulk superfluid 3He at zero magnetic field, two phases emerge with the B phase stable everywhere except at high pressures and temperatures where the A phase is favored. Aerogels with nanostructure smaller than the superfluid coherence length are the only means to introduce disorder into the superfluid. Here we use a torsion pendulum to study 3He confined in an extremely anisotropic, nematically ordered aerogel consisting of roughly 10 nm thick alumina strands, spaced by about 100 nm, and aligned parallel to the pendulum axis. Kinks in the development of the superfluid fraction (at various pressures) as the temperature is varied correspond to phase transitions. Two such transitions are seen in the superfluid state, and we identify the superfluid phase closest to Tc at low pressure as the Polar state, a phase that is not seen in bulk 3He.
Description
Here we deposit the data which is shown in the figures of the Nature Communications article titled: Observation of a new superfluid phase for ³He embedded in nematically ordered aerogel
Date Issued
2016Subject
Helium-3, nematic aerogel, phase diagram, polar phase
Related Publication(s)
Zhelev, N. et al. (2016). Observation of a new superfluid phase for 3He embedded in nematically ordered aerogel. Nat. Commun. 7, 12975 doi: 10.1038/ncomms12975
Link(s) to Related Publication(s)
Type
dataset