Two-magnon states in Cu(NO3)2*2.5D2O using inelastic neutron scattering

D. A. Tennant; C. Broholm; Daniel H. Reich; S. E. Nagler; G. E. Granroth; T. Barnes; G. Xu; B. C. Sales; Y. Chen

Two-magnon states in Cu(NO3)2*2.5D2O using inelastic neutron scattering

Strongly Correlated Electrons 2007-05-23 v1 Statistical Mechanics

Authors: D. A. Tennant , C. Broholm , Daniel H. Reich , S. E. Nagler , G. E. Granroth , T. Barnes , G. Xu , B. C. Sales , Y. Chen

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Abstract

We report measurements of the two-magnon states in a dimerized antiferromagnetic chain material, copper nitrate (\QTR{group}{Cu(NO $_{3}$ ) $_{2}\cdot 2.5$ D $_{2}$ O}). Using inelastic neutron scattering, we have studied the one- and two-magnon excitation spectra in a large single crystal of this material. We compare this new data with perturbative expansions of the alternating Heisenberg chain and find good agreement with these calculations. The data may also show evidence for the recently proposed S=1 two-magnon bound state (Phys. Rev. B54, R9624 (1996)).

Keywords

two-magnon states inelastic neutron scattering antiferromagnetic chain Heisenberg chain magnon bound state

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@article{arxiv.cond-mat/0005222,
  title  = {Two-magnon states in Cu(NO3)2*2.5D2O using inelastic neutron scattering},
  author = {D. A. Tennant and C. Broholm and Daniel H. Reich and S. E. Nagler and G. E. Granroth and T. Barnes and G. Xu and B. C. Sales and Y. Chen},
  journal= {arXiv preprint arXiv:cond-mat/0005222},
  year   = {2007}
}

Comments

10 pages, 4 figures, fig(3) in color

Two-magnon states in Cu(NO3)2*2.5D2O using inelastic neutron scattering

Abstract

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