Inelastic Neutron Scattering from the Spin Ladder Compound (VO)2P2O7

R. S. Eccleston; T. Barnes; J. Brody; J. W. Johnson

doi:10.1103/PhysRevLett.73.2626

Inelastic Neutron Scattering from the Spin Ladder Compound (VO)2P2O7

Condensed Matter 2009-10-22 v1

Authors: R. S. Eccleston , T. Barnes , J. Brody , J. W. Johnson

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Abstract

We present results from an inelastic neutron scattering experiment on the candidate Heisenberg spin ladder vanadyl pyrophosphate, (VO)2P2O7. We find evidence for a spin-wave excitation gap of $E_{gap} = 3.7\pm 0.2$ meV, at a band minimum near $Q=0.8 A^{-1}$ . This is consistent with expectations for triplet spin waves in (VO)2P2O7 in the spin-ladder model, and is to our knowledge the first confirmation in nature of a Heisenberg antiferromagnetic spin ladder.

Keywords

spin excitations in condensed matter

Cite

@article{arxiv.cond-mat/9406016,
  title  = {Inelastic Neutron Scattering from the Spin Ladder Compound (VO)2P2O7},
  author = {R. S. Eccleston and T. Barnes and J. Brody and J. W. Johnson},
  journal= {arXiv preprint arXiv:cond-mat/9406016},
  year   = {2009}
}

Comments

11 pages and 2 figures (available as hard copy or postscript files from the authors, send request to [email protected] or [email protected]), TEX using jnl, reforder and eqnorder, ORNL-CCIP-94-05 / RAL-94-044