CMT79

Josephson effects in unconventional heavy fermion superconductors

• Author(s): S. K. Yip, Y. S. Sun and J. A. Sauls
• Date: September 1996
• Journal: Czech J Phys (1996) 46: 557-559 [DOI]
• Abstract: We discuss the Josephson effect for pairing states which break crystal symmetries in addition to gauge symmetry. We consider the E_1g and E_2u models for the low-temperature phase of UPt₃, with order parameters Δ(E_1g) ~ p_z(p_x + i p_y) and Δ(E_2u) ~ p_z(p_x + i p_y)². We report calculations of Josephson critical currents, taking into account the effects of depairing at the interface. For singlet-triplet junctions the critical current is non-zero only for spin-orbit, spin-flip tunneling, and is found to be much smaller than the Ambegaokar-Baratoff value even when the spin-orbit tunneling amplitude is comparable to the spin-independent amplitude.

• Comment: Proceedings of the 21^st International Conference on Low Temperature Physics, Prague, August 8-14, 1996; 2 pages, 1 figure.

• Eprint: [PDF]

Return to index