Ding Chuan Chen

Surface superconductivity andHc3 in UPt3

AbstractGinzburg-Landau (GL) theory is used to study surface superconductivity for UPt3 for various order parameter symmetries (OPS), andHc3 is found for all principal directions of the surface normal

Constraints on the order parameter of superconducting UPt3 from the phase diagram

\hat n

Accidental near degeneracy of the order parameter for superconducting UPt3.

and the field [1]. Assuming specular reflection, and allowing for reorientation of the antiferromagnetic symmetry breaking field in the models withE1g,E2g,E1u, orE2u symmetry, the experiments of Keller et al. [2] with

Surface superconductivity and Hc3 in UPt3.

\hat n = \hat a

Surface superconductivity and

can be qualitatively explained for all OPS except possiblyA1u⊕B1u. The implied GL parameters then predict qualitatively different and OPS dependent behavior for