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Phys. Rev. B 73, 094512 (2006) [5 pages]

Resonance mode in B1g Raman scattering: A way to distinguish between spin-fluctuation and phonon-mediated d-wave superconductivity

A. V. Chubukov,1 T. P. Devereaux,2 and M. V. Klein3
1Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA
2Department of Physics, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
3Department of Physics, University of Illinois, Urbana, Ilinois 61801, USA

Received 26 August 2005; revised 24 January 2006; published 24 March 2006

We argue that Raman scattering in B1g symmetry allows one to distinguish between phonon-mediated and magnetically mediated d-wave superconductivity. In spin-mediated superconductors, B1g Raman intensity develops a resonance at a frequency Omegares<2Deltamax, whose origin is similar to a neutron resonance. In phonon-mediated d-wave superconductors, such a resonance does not develop. Several extensions of the argument are presented.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevB.73.094512
DOI: 10.1103/PhysRevB.73.094512
PACS: 74.25.Gz; 74.20.Rp; 74.25.Jb; 78.30.-j
  • 74.25.Gz
    Optical properties of superconductors
  • 74.20.Rp
    Pairing symmetries (other than s-wave) in superconductivity theory
  • 74.25.Jb
    Electronic structure of superconductors
  • 78.30.-j
    Infrared and Raman spectra (condensed matter)
  • YEAR: 2006
KEYWORDS: Raman spectra, spin fluctuations, phonons, d-wave superconductivity

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