Raman spectra in chiral superconductors

The clapping modes with angular momentum 2 are common to the spin triplet superconductors, which breaks chiral symmetry like Sr2RuO4 [Phys. Rev. B 67 (2003) 180504] and (TMTSF)(2)PF6 [Phys. Rev. Lett. 88 (2002) 017004]. These clapping modes appear as a huge resonance in B-1g and B-2g Raman spectra [Phys. Rev. B 67 (2003) 180504]. Therefore the Raman experiment will provide a unique signature of the underlying superconductors. We discuss the Raman spectra of Sr2RuO4 in terms of two competing models; 2-dimensional f-wave model and multi-gap model by Zhitomirsky and Rice [Phys. Rev. Lett. 87 (2001) 057001]. (C) 2004 Elsevier B.V. All rights reserved.