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

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

File(s)
PaperFig3_Jul29.png (200.05 KB)
Fig 3 of the paper
SuperfluidFraction vs 1-ToverTcaerogel Fig3c-h.xlsx (172.75 KB)
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
PaperFig1_Jul29.png (901.51 KB)
Figure 1 of the paper
Phase Diagram Data Fig4ab.xlsx (54.13 KB)
Data shown in Figure 4 panels a and b -- Locations of the phase transition temperatures for 3He in the nematically ordered aerogel
Bulk Phase Diagram Fig2a.xlsx (9.2 KB)
Data shown in Figure 2a of the paper -- Bulk 3He phase diagram.
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Permanent Link(s)
https://hdl.handle.net/1813/44555
Collections
Physics Research
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
Sponsorship
National Science Foundation, via DMR 1202991 and PHY 1508300
Date Issued
2016
Keywords
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)
https://dx.doi.org/10.1038/ncomms12975
Type
dataset

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