Stability of Superfluid He 3 - B in Compressed Aerogel

J. I.A. Li*, A. M. Zimmerman, J. Pollanen, C. A. Collett, W. J. Gannon, W. P. Halperin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


In recent work, it was shown that new anisotropic p-wave states of superfluid He3 can be stabilized within high-porosity silica aerogel under uniform positive strain. In contrast, the equilibrium phase in an unstrained aerogel is the isotropic superfluid B phase. Here we report that this phase stability depends on the sign of the strain. For a negative strain of ∼20% achieved by compression, the B phase can be made more stable than the anisotropic A phase, resulting in a tricritical point for A, B, and normal phases with a critical field of ∼100 mT. From pulsed NMR measurements, we identify these phases and the orientation of the angular momentum.

Original languageEnglish (US)
Article number115303
JournalPhysical review letters
Issue number11
StatePublished - Mar 18 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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