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High-Frequency Spin Waves in YBa2Cu3O6.15

Condensed Matter 2009-10-28 v2

Abstract

Pulsed neutron spectroscopy is used to make absolute measurements of the dynamic magnetic susceptibility of insulating YBa2Cu3O6.15. Acoustic and optical modes, derived from in- and out-of-phase oscillation of spins in adjacent CuO2 planes, dominate the spectra and are observed up to 250 meV. The optical modes appear first at 74 meV. Linear-spin-wave theory gives an excellent description of the data and yields intra- and inter-layer exchange constants of J_parallel =125 meV and J_perp = 11 meV respectively and a spin-wave intensity renormalization Z_chi = 0.4.

Keywords

Cite

@article{arxiv.cond-mat/9605139,
  title  = {High-Frequency Spin Waves in YBa2Cu3O6.15},
  author = {S. M. Hayden and G. Aeppli and T. G. Perring and H. A. Mook and F. Dogan},
  journal= {arXiv preprint arXiv:cond-mat/9605139},
  year   = {2009}
}

Comments

postscript, 11 pages, 4 figures, Fig.2 fixed

R2 v1 2026-07-22T11:53:14.699Z