Pinning of dynamic spin density wave fluctuations in the cuprate superconductors
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 modulations are observable by scanning tunnelling microscopy, and we establish a connection between its spectrum and the dynamic spin structure factor measured by inelastic neutron scattering.Keywords
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