Critical Current of the Spin-Triplet Superconducting Phase in Sr$_2$RuO$_4$

Details Critical Current of the Spin-Triplet Superconducting Phase in Sr$_2$RuO$_4$ Critical Current of the Spin-Triplet Superconducting Phase in Sr$_2$RuO$_4$

2003-09-05

arxiv.org/abs/cond-mat/0309156v1

Phys. Rev. B 70, 052505 (2004).

Physics

Condensed Matter

Superconductivity

4 pages, 1 figure

Scientific paper

10.1103/PhysRevB.70.052505

There have been two different proposals for the spin-triplet order parameter of the superconducting phase in Sr$_2$RuO$_4$; an $f$-wave order parameter and the multigap model where some of the bands have the line node. In an effort to propose an experiment that can distinguish two cases, we study the behavior of the supercurrent and compute the critical current for these order parameters when the sample is a thin film with the thickness $d \ll \xi$ where $\xi$ is the coherence length. It is found that the supercurrent behaves very differently in two models. This will serve as a sharp test for the identification of the correct order parameter.

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