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Interchain interactions and magnetic properties of Li2CuO2

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arxiv cond-mat/9904283 v2 pith:IOGMKKJN submitted 1999-04-20 cond-mat

Y. Mizuno , T. Tohyama , S. Maekawa This is my paper
classification cond-mat
keywords interactionsinterchainchainshamiltonianli2cuo2magneticomegaspectra
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An effective Hamiltonian is constructed for an insulating cuprate with edge-sharing chains Li2CuO2.The Hamiltonian contains the nearest and next-nearest neighboring intrachain and zigzag-type interchain interactions.The values of the interactions are obtained from the analysis of the magnetic susceptibility, and this system is found to be described as coupled frustrated chains.We calculate the dynamical spin correlation function S(q,\omega) by using the exact diagonalization method, and show that the spectra of S(q,\omega) are characterized by the zigzag-type interchain interactions. The results of the recent inelastic neutron scattering experiment are discussed in the light of the calculated spectra.

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