Supercurrent through hybrid junctions with anisotropic Cooper-pair condensates.
A general formula for the supercurrent between different internal structures in a wide class of hybrid junctions is derived on the basis of the Andreev-reflection picture. The formula extends existing formulas and also enables us to analyze novel B-phase/A-phase/B-phase junctions in superfluid 3He systems. We propose a mechanism for pi states due to the (circumflex)l texture in the A phase of the junction, which could elucidate major features of the pi states with higher critical current ( H states) discovered in superfluid 3He weak links. The bistability of the pi states is also discussed.
Nishida
Munehiro
M
Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 2200 FIN-02015 HUT, Finland.
Hatakenaka
Noriyuki
N
Kurihara
Susumu
S