Stabilized Pair Density Wave via Nanoscale Confinement of Superfluid 3-He
Physical Review Letters 124, 015301 – Published 3 January 2020
A.J. Shook, V. Vadakkumbatt, P. Senarath Yapa, C. Doolin, R. Boyack, P.H. Kim, G.G. Popowich, F. Souris, H. Christani, J. Maciejko, and J.P. Davis
Superfluid 3-He under nanoscale confinement has generated significant interest due to the rich spectrum of phases with complex order parameters that may be stabilized. Experiments have uncovered a variety of interesting phenomena, but a complete picture of superfluid 3-He under confinement has remained elusive. Here, we present phase diagrams of superfluid 3-He under varying degrees of uniaxial confinement, over a wide range of pressures, which elucidate the progressive stability of both the A phase, as well as a growing region of stable pair density wave state.