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29 March 2024
 
  » arxiv » cond-mat/9807186

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Magnetic Properties of (VO)_2P_2O_7 from Frustrated Interchain Coupling
G. S. Uhrig ; B. Normand ;
Date 13 Jul 1998
Journal PRB 58, R14705 (1998)
Subject Strongly Correlated Electrons | cond-mat.str-el
AbstractNeutron-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.
Source arXiv, cond-mat/9807186
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