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

Hae-Young Kee
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Abstract

We study the spin dynamics in a p-wave superconductor at the nesting vector associated with $α$ and $β$ 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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Hae-Young Kee. 1999-08-31. Probing Pairing Symmetry in Sr$_2$RuO$_4$. https://doi.org/10.1088/0953-8984%2F12%2F10%2F311

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