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Pinning of dynamic spin density wave fluctuations in the cuprate superconductors

Anatoli Polkovnikov·Matthias Vojta·Subir Sachdev
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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.

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Anatoli Polkovnikov, Matthias Vojta, Subir Sachdev. 2002-03-13. Pinning of dynamic spin density wave fluctuations in the cuprate superconductors. https://doi.org/10.1103/physrevb.65.220509

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