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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 | Abstract: | 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. | Source: | arXiv, cond-mat/9807186 | Services: | Forum | Review | PDF | Favorites |
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