Probing Pairing Symmetry in Sr$_2$RuO$_4$

Details Probing Pairing Symmetry in Sr$_2$RuO$_4$ Probing Pairing Symmetry in Sr$_2$RuO$_4$

1999-08-31

arxiv.org/abs/cond-mat/9908486v1

J. of Physics: Cond. Matt. 12, 2279 (2000)

Physics

Condensed Matter

Superconductivity

5 pages, RevTex

Scientific paper

10.1088/0953-8984/12/10/311

We study the spin dynamics in a p-wave superconductor at the nesting vector associated with $\alpha$ and $\beta$ bands in Sr$_2$RuO$_4$. We find a collective mode at the nesting vector in the superconducting phase identified as the odd-parity pairing state which breaks time reversal symmetry. This mode in the spin channel only exists in the p-wave superconductor, not in s- or d-wave superconductors. We propose that probing this mode would clarify the pairing symmetry in Sr$_2$RuO$_4$. The possibility of second superconducting phase transition is also discussed.

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