Comment on ``Spin Correlations in the Paramagnetic Phase and Ring Exchange in LaCuO''

Details Comment on ``Spin Correlations in the Paramagnetic Phase and Ring Exchange in LaCuO'' Comment on ``Spin Correlations in the Paramagnetic Phase and Ring Exchange in LaCuO''

2005-10-30

arxiv.org/abs/cond-mat/0510811v1

Phys. Rev. Lett. 97, 049701 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

2 pages, 1 figure, RevTex

Scientific paper

10.1103/PhysRevLett.97.049701

It is shown that the experiments of A.M. Toader, J. P. Goff, M. Roger, N.
Shannon, J. R. Stewart, and M. Enderle, Phys. Rev. Lett. 94, 197202 (2005) do
not provide definitive experimental evidence for ring exchange terms in the
Hamiltonian of La2CuO4, even though such terms may be present.

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