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Spin excitations of ferronematic order in underdoped cuprate superconductors.

Authors
  • Seibold, G
  • Di Castro, C
  • Grilli, M
  • Lorenzana, J
Type
Published Article
Journal
Scientific Reports
Publisher
Springer Nature
Publication Date
Jan 01, 2014
Volume
4
Pages
5319–5319
Identifiers
DOI: 10.1038/srep05319
PMID: 24936723
Source
Medline
License
Unknown

Abstract

High-temperature superconductors exhibit a characteristic hourglass-shaped spectrum of magnetic fluctuations which most likely contribute to the pairing glue in the cuprates. Recent neutron scattering experiments in strongly underdoped compounds have revealed a significant low energy anisotropy of these fluctuations which we explain by a model in which topological defects of the antiferromagnet clump to producing domain wall segments with ferronematic order. This state does not invoke global charge order but breaks C4 rotational and inversion symmetry. The incommensurability of the low doping charge-disordered state is in good agreement with experiment and interpolates smoothly with the incommensurability of the stripe phase at higher doping. Within linear spin-wave theory the dynamic structure factor is in very good agreement with inelastic neutron scattering data and can account for the observed energy dependent anisotropy.

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