Vortices and NMR in rotating3He-B

Abstract

The core structure of singly quantized vortices in3He-B is studied in the Ginzburg-Landau regime. For zero magnetic field, variational estimates indicate a core anisotropy

the gap is suppressed along the component of n in the plane perpendicular to the vortex axis within a core of radius ∼6ξ. For large fields (∼300 Oe) parallel to the vortex axis, a similar transverse anisotropy occurs, but its azimuthal direction is degenerate to leading order. The effective coupling constant λ in a rotating system arises from the kinetic energy of the flow, with anisotropy contributions smaller by two orders of magnitude. Predictions about the transverse NMR are compared with the observed resonances

detection of the corresponding longitudinal modes could help confirm the theoretical description. © 1983 Plenum Publishing Corporation.