Ann. Phys. Fr.
Volume 19, Number 4, 1994
|Page(s)||367 - 384|
|Published online||01 June 2004|
Superconductivity in UPt3
Institut Laue-Langevin, B.P. 156, 38042 Grenoble Cedex, France
The theory of basal plane anisotropy of upper critical field in hexagonal heavy fermionic superconductors UPt3 is developed. It is shown, that the recent experimental discovery of the sign change of this anisotropy above the tetracritical point in ( H, T) plane proves to be the most important experimental argument in favour of the model of unconventional superconductivity mixing in the order parameters transforming according to different one-dimensional representation of the hexagonal group. The current model describing the superconducting phase transition splittig in UPt3 are critically overviewed in the light of mentioned observation.
PACS: 7460E – Mixed state, H/sub c/sub 2, surface sheath / 7470T – Heavy fermion superconductors
Key words: heavy fermion superconductors / platinum alloys / superconducting critical field / uranium alloys / basal plane anisotropy / upper critical field / heavy fermionic superconductors / tetracritical point / unconventional superconductivity / order parameters / one dimensional representation / hexagonal group / superconducting phase transition / UPt sub 3
© EDP Sciences, 1994