Ginzburg-Landau (GL) theory is used to study surface superconductivity for UPt3 for various order parameter symmetries (OPS), and Hc3 is found for all principal directions of the surface normal n̂ and the field . Assuming specular reflection, and allowing for reorientation of the antiferromagnetic symmetry breaking field in the models with E1g, E2g, E1u, or E2u symmetry, the experiments of Keller et al.  with n̂ = â can be qualitatively explained for all OPS except possibly A1u ⊕ B1u. The implied GL parameters then predict qualitatively different and OPS dependent behavior for n̂ = â* and n̂ = ĉ. Study of Hc3 for these surfaces would give strong clues about the OPS of UPt3.
ASJC Scopus subject areas
- Physics and Astronomy(all)