Electromagnetic Response of a $k_x\pm i{k}_y$ Superconductor: Effect of Order Parameter Collective Modes

Abstract

Effects of order parameter collective modes on electromagnetic response are studied for a clean spin-triplet superconductor with $k_x\pm i{k}_y$ orbital symmetry, which has been proposed as a candidate pairing symmetry for Sr${}_2$RuO${}_4$. It is shown that the $k_x\pm i{k}_y$ superconductor has characteristic massive collective modes analogous to the clapping mode in the A-phase of superfluid ${}^3$He. We discuss the contribution from the collective modes to ultrasound attenuation and electromagnetic absorption. We show that in the electromagnetic absorption spectrum the clapping mode gives rise to a resonance peak well below the pair breaking frequency, while the ultrasound attenuation is hardly influenced by the collective excitations.

4 pages RevTex, 1 eps figure

References in corpus (3)

• Time-Reversal Symmetry Breaking Superconductivity in Sr2RuO4
• Observation of Induced Chern-Simons Term in P- and T- violating Superconductors
• E-B Mixing in T-violating Superconductors

Cited by in corpus (9)

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• Spectroscopic signatures of time-reversal symmetry breaking superconductivity
• Chiral Higgs Mode in Nematic Superconductors
• Leggett modes and multi-band superconductivity in Sr2RuO4
• Raman Spectra of Triplet Superconductor in Sr${}_2$RuO${}_4$
• Critical Current of the Spin-Triplet Superconducting Phase in Sr${}_2$RuO${}_4$
• Universal collective modes in 2 dimensional chiral superfluids
• Linear spectroscopy of collective modes and the gap structure in two-dimensional superconductors
• Anomalous acoustoelectric effect induced by clapping modes in chiral superconductors