Vortex lattice structures for unconventional superconductivity in UPt3

✍ Scribed by K. Machida; T. Fujita; T. Ohmi; M. Ozaki

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 187 KB
• Volume: 213-214
• Category: Article
• ISSN: 0921-4526
• DOI: 10.1016/0921-4526(95)00082-k

✦ Synopsis

Recent small angle neutron scattering experiments under an external field H by Kleiman et al. reveal that in UPt3 a distorted vortex lattice is stabilized and the rhombic unit cell angle ct(H) varies continuously with increasing H applied perpendicular to the hexagonal c-axis. To understand this interesting observation, we calculate the stable vortex lattices by assuming a non-trivial superconducting state with two component order parameters appropriate for U Pt3. We find by constructing the phase diagrams for HIIc and H_l_c that (1) the unexpected ~(H) behavior in the B phase is indeed explained by the present calculation, (2) however, in the A and C phases ~ must be independent of H and T, and (3) thus at the BC transition c~(H) should exhibit a kink which may be checked by a neutron experiment.