Nonanalytic supercurrents in /sup 3/He-A

Journal Article · Fri Apr 01 04:00:00 EST 1983 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.27.4243· OSTI ID:5908227

Muzikar, P; Rainer, D

The energy gap of the A phase of superfluid /sup 3/He has two singular points on the Fermi surface. These singular points lead to various theoretical puzzles, including one recently discovered by Volovik and Mineev. These authors, using a generalized--gauge-trans- p formation approximation, find a term in the T = 0 supercurrent which is nonanalytic in gradients of the order parameter. We use the quasiclassical equations invented by Eilenberger to check the validity of their approximation; we find that the generalized--gauge-transformation approximation fails, in that terms it leaves out make important (in fact, divergent) contributions to the nonanalytic supercurrent. We then formulate a new way to calculate the leading nonanalytic terms in the supercurrent.

• Research Organization: Nordisk Institut for Teoretisk Atomfysik (NORDITA), Blegdamsvej 17, DK-2100 Copenhagen, Denmark
• OSTI ID: 5908227
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 27:7; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

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656101 -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSOLUTE ZERO TEMPERATURE
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY GAP
EVEN-ODD NUCLEI
FUNCTIONS
GAUGE INVARIANCE
GREEN FUNCTION
HELIUM 3
HELIUM 3 A
HELIUM ISOTOPES
INVARIANCE PRINCIPLES
ISOTOPES
LIGHT NUCLEI
NUCLEI
ORDER PARAMETERS
PHYSICAL PROPERTIES
SINGULARITY
STABILITY
STABLE ISOTOPES
SUPERCONDUCTIVITY
SUPERFLUIDITY