2014/01/21 by J. I. A. Li, A. M. Zimmerman, J. Pollanen +4
Physics and Astronomy · #Atomic and Subatomic Physics Research #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.112.115303
published as Phys. Rev. Lett. 112, 115303 (2014) · 4 pages and 3 figures
arxiv created 2014/01/21 · openalex publication_date 2014/03/18 · arxiv updated 2014/03/19 · openalex created_date 2020/05/13 · openalex updated_date 2026/07/28
In recent work, it was shown that new anisotropic p-wave states of superfluid (3)He 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.