Observation of a new superfluid phase for ³He embedded in nematically ordered aerogel
Data shown in Figure3 panels a and b in the paper -- Superfluid fraction vs T/Tcbulk for the six experimental pressures on both cooling and warming [Microsoft Excel] (152.4Kb)
Data shown in Figure 3 panels c-h in the paper -- Superfluid fraction vs 1-T/Tcaerogel for cooling and warming for the six experimental pressures along with GL model fits [Microsoft Excel] (172.7Kb)
Data shown in Figure 4 panels a and b -- Locations of the phase transition temperatures for 3He in the nematically ordered aerogel [Microsoft Excel] (54.12Kb)
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Zhelev, Nikolay; Reichl, Matthew; Abhilash, Thanniyil Sebastian; Smith, Eric Nelson; Nguyen, Kayla X.-T.; Meuller, Erich J.; Parpia, Jeevak M.
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.
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
National Science Foundation, via DMR 1202991 and PHY 1508300
Helium-3, nematic aerogel, phase diagram, polar phase
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
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