Fig. 4: Topological mesoscopic superfluidity, where confinement tunes 3He into different material phases, enabling hybrid structures.
From: Fragility of surface states in topological superfluid 3He
a An SNS junction, where spatial modulation of cavity height defines SN interfaces. b Circular region of higher cavity height defines an isolated mesa of superfluid, cooled through normal liquid in a more confined region. Purple plates represent the silicon wafer, darker blue regions normal liquid 3He, and lighter more transparent regions superfluid 3He.
