Pinning of dynamic spin density wave fluctuations in the cuprate superconductors

Details Pinning of dynamic spin density wave fluctuations in the cuprate superconductors Pinning of dynamic spin density wave fluctuations in the cuprate superconductors

2002-03-08

arxiv.org/abs/cond-mat/0203176v2

Physical Review B 65, 220509 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 5 figure; (v2) modified abstract only to mention analogy with Friedel oscillations, which was also discussed in page

Scientific paper

10.1103/PhysRevB.65.220509

We present a theory of the pinning of dynamic spin density wave (SDW) fluctuations in a d-wave superconductor by local imperfections which preserve spin-rotation invariance, such as impurities or vortex cores. The pinning leads to static spatial modulations in spin-singlet observables, while the SDW correlations remain dynamic: these are the `Friedel oscillations' of a spin-gap antiferromagnet. We connect the spectrum of these modulations as observed by scanning tunnelling microscopy to the dynamic spin structure factor measured by inelastic neutron scattering.

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