Excitons in QED3 and spin response in a phase-fluctuating d-wave superconductor

Details Excitons in QED3 and spin response in a phase-fluctuating d-wave superconductor Excitons in QED3 and spin response in a phase-fluctuating d-wave superconductor

2007-01-30

arxiv.org/abs/cond-mat/0701724v2

Phys.Rev.B76:024503,2007

Physics

Condensed Matter

Superconductivity

8 pages, 3 .eps fugures, RevTeX4; v2: Brief literature review added, references updated and a few typos corrected. Published v

Scientific paper

10.1103/PhysRevB.76.024503

We study the particle-hole exciton mode in the QED3 theory of a phase-fluctuating d-wave superconductor in ladder approximation. We derive a Schroedinger-like equation for the exciton bound state and determine the conditions for its existence. We find the dispersion of this mode below the particle-hole continuum and compare our results with the resonance observed in neutron scattering measurements in cuprates.

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