Magnetic Properties of (VO)_2P_2O_7 from Frustrated Interchain Coupling

Details Magnetic Properties of (VO)_2P_2O_7 from Frustrated Interchain Coupling Magnetic Properties of (VO)_2P_2O_7 from Frustrated Interchain Coupling

1998-07-13

arxiv.org/abs/cond-mat/9807186v2

PRB 58, R14705 (1998)

Physics

Condensed Matter

Strongly Correlated Electrons

RevTeX, 5 pages, 6 figures, compressed from first version

Scientific paper

10.1103/PhysRevB.58.R14705

Neutron-scattering experiments on (VO)_2P_2O_7 reveal both a gapped magnon dispersion and an unexpected, low-lying second mode. The proximity and intensity of these modes suggest a frustrated coupling between the alternating spin chains. We deduce the minimal model containing such a frustration, and show that it gives an excellent account of the magnon dispersion, static susceptibility and electron spin resonance absorption. We consider two-magnon states which bind due to frustration, and demonstrate that these may provide a consistent explanation for the second mode.

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