Superfluid current in 3A at T=0. II
Abstract
We show that, except for the correction in the longitudinal superfluid density ρs =ρ[1-(3/2)(ħvF/δ) ||(l^.∇)l^||], all the nonanalytic contributions to the supercurrent which have been studied previously vanish. It is shown that, if one does not use a gauge transformation, one has to go beyond the linear approximation for the spatial variations of the gap in order to treat consistently the superfluid velocity.
- Publication:
-
Physical Review B
- Pub Date:
- September 1985
- DOI:
- 10.1103/PhysRevB.32.2960
- Bibcode:
- 1985PhRvB..32.2960C
- Keywords:
-
- 67.50.Fi