Tunnelling between non-centrosymmetric superconductors with significant spin-orbit splitting studied theoretically within a two-band treatment

Abstract

Tunnelling between non-centrosymmetric superconductors with significant spin-orbit splitting is studied theoretically in a two-band treatment of the problem. We find that the critical Josephson current may be modulated by changing the relative angle between the vectors describing absence of inversion symmetry on each side of the junction. The presence of two gaps also results in multiple steps in the quasiparticle current-voltage characteristics. We argue that both these effects may help to determine the pairing states in materials like CePt${}_3$Si, UIr and Cd${}_2$Re${}_2$O${}_7$. We propose experimental tests of these ideas, including scanning tunnelling microscopy.

5 pages, 1 figure. Minor changes. Some new references added. Journal-ref. added

References in corpus (2)

• Metallic "Ferroelectricity" in the Pyrochlore Cd2Re2O7
• Order parameter in superconductors with non-degenerate bands

Cited by in corpus (10)

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• Effects of impurities on superconductivity in noncentrosymmetric compounds
• Fractional flux quanta at intrinsic metallic interfaces of noncentrosymmetric superconductors
• Nontrivial interplay between superconductivity and spin-orbit coupling in non-centrosymmetric ferromagnets
• Transfer-matrix approach to multiband Josephson junctions
• Using Josephson junctions to determine the pairing state of superconductors without crystal inversion symmetry
• Josephson effect in thin-film superconductor/insulator/superconductor junctions with misaligned in-plane magnetic fields
• Josephson Effect between Conventional and Rashba Superconductors