Inelastic light scattering from collective modes in a layered superconductor with Cooper-pair tunneling

Wen Chin Wu, A. Griffin

研究成果: 雜誌貢獻文章

9 引文 斯高帕斯(Scopus)


In a superconducting bilayer with Cooper-pair tunneling (TJ 0) between the layers, it has been recently predicted that there should exist in-phase and out-of-phase phase and amplitude fluctuations of the order parameters of the two layers. As a way of observing these phase modes, we calculate the inelastic light scattering from a semi-infinite superconducting superlattice with a bilayer basis. For simplicity, we ignore surface modes. We show that the bulk phase-modes show up as resonances in the isotropic Raman light scattering intensity at finite momentum transfer parallel to the surface. Our specific calculations are for s-wave superconductors but similar results are expected for d-wave pairing. The size of the energy gap of the out-of-phase modes is strongly dependent on the ratio of TJ and the intralayer pairing interaction g, as well as particle-hole damping.

頁(從 - 到)7742-7748
期刊Physical Review B
出版狀態已發佈 - 1995 一月 1


ASJC Scopus subject areas

  • Condensed Matter Physics