Nearly isotropic d-wave pairing in UPt3

✍ Scribed by M.E. Zhitomirsky; I.A. Luk'yanchuk

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 152 KB
• Volume: 206-207
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(94)00523-x

✦ Synopsis

The available phase diagram of UPt 3 in H-T-P coordinates imposes strong restrictions on all theories which are going to explain it. We present a self-consistent solution of this problem. In our picture UPt 3 is a d-wave nearly isotropic superconductor with small splitting of critical temperature according to the irreducible representations of a D6b group. Two of these representations A~g and E~s are responsible for the phase transitions in UPt 3. The order of high-and low-temperature representations reverses under pressure. This scenario explains all the peculiarities of the UPt3 phase diagram such as the existence of a tetracritical point in the H-T plane, a kink in Hc2(T ) for different orientations of magnetic field, the behavior of superconducting phases under pressure and others.