Spin Gap in Optimally-doped YBCO

D. Reznik; L. Pintschovius; Y. Endoh; P. Bourges; Y. Sidis; T. Masui; S. Tajima

doi:10.1016/j.jpcs.2005.09.088

Spin Gap in Optimally-doped YBCO

Superconductivity 2009-11-11 v1 Strongly Correlated Electrons

Authors: D. Reznik , L. Pintschovius , Y. Endoh , P. Bourges , Y. Sidis , T. Masui , S. Tajima

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Abstract

Spin gap in optimally-doped YBCO was investigated by inelastic neutron scattering. We found that q-integrated spectral weight in the vicinity of the spin gap has a shape of a step function at 10K with sharp resolution-limited onset at 33 meV, i.e. there is no observable spectral weight at 31 meV but full spectral weight at 35 meV. The spin gap does not soften or "fill in" as the temperature is increased to Tc. Above Tc we find no evidence for q-dependent magnetic signal at 35 meV.

Keywords

spin excitations in condensed matter

Cite

@article{arxiv.cond-mat/0609752,
  title  = {Spin Gap in Optimally-doped YBCO},
  author = {D. Reznik and L. Pintschovius and Y. Endoh and P. Bourges and Y. Sidis and T. Masui and S. Tajima},
  journal= {arXiv preprint arXiv:cond-mat/0609752},
  year   = {2009}
}

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