## 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 UPt_{3}, 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]