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

Wen Chin Wu, A. Griffin

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)7742-7748
Number of pages7
JournalPhysical Review B
Volume52
Issue number10
DOIs
Publication statusPublished - 1995 Jan 1
Externally publishedYes

Fingerprint

Inelastic scattering
Light scattering
Superconducting materials
inelastic scattering
light scattering
Momentum transfer
Particle interactions
Raman scattering
Energy gap
Damping
momentum transfer
damping
Raman spectra
interactions

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Inelastic light scattering from collective modes in a layered superconductor with Cooper-pair tunneling. / Wu, Wen Chin; Griffin, A.

In: Physical Review B, Vol. 52, No. 10, 01.01.1995, p. 7742-7748.

Research output: Contribution to journalArticle

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