TY - JOUR
T1 - Stability of Superfluid He 3 - B in Compressed Aerogel
AU - Li, J. I.A.
AU - Zimmerman, A. M.
AU - Pollanen, J.
AU - Collett, C. A.
AU - Gannon, W. J.
AU - Halperin, W. P.
PY - 2014/3/18
Y1 - 2014/3/18
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/84897847593
UR - https://www.scopus.com/pages/publications/84897847593#tab=citedBy
U2 - 10.1103/PhysRevLett.112.115303
DO - 10.1103/PhysRevLett.112.115303
M3 - Article
AN - SCOPUS:84897847593
SN - 0031-9007
VL - 112
JO - Physical Review Letters
JF - Physical Review Letters
IS - 11
M1 - 115303
ER -