2002/03/13 by Anatoli Polkovnikov, Matthias Vojta, Subir Sachdev · 13 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.65.220509
published as Physical Review B 65, 220509 (2002) · 4 pages, 5 figure; (v2) modified abstract only to mention analogy with Friedel oscillations, which was also discussed in page 9 of cond-mat/0112343
arxiv created 2002/03/13 · openalex publication_date 2002/06/06 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We present a theory of the pinning of dynamic spin-density-wave (SDW) fluctuations in a d-wave superconductor by local imperfections that 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.