Pinning of dynamic spin density wave fluctuations in the cuprate superconductors
Strongly Correlated Electrons
2007-05-23 v2 Superconductivity
Abstract
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.
Keywords
Cite
@article{arxiv.cond-mat/0203176,
title = {Pinning of dynamic spin density wave fluctuations in the cuprate superconductors},
author = {Anatoli Polkovnikov and Matthias Vojta and Subir Sachdev},
journal= {arXiv preprint arXiv:cond-mat/0203176},
year = {2007}
}
Comments
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