Magnetic properties of (VO)(2)P2O7 from frustrated interchain coupling

Authors
Uhrig, GS Normand, B
Citation
Gs. Uhrig et B. Normand, Magnetic properties of (VO)(2)P2O7 from frustrated interchain coupling, PHYS REV B, 58(22), 1998, pp. R14705-R14708
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
58
Issue
22
Year of publication
1998
Pages
R14705 - R14708
Database
ISI
SICI code
0163-1829(199812)58:22<R14705:MPO(FF>2.0.ZU;2-6
Abstract
Neutron-scattering experiments on (VO)(2)P2O7 reveal both a gapped magnon d ispersion and an unexpected, low-lying second mode. The proximity and inten sity of these modes suggest a frustrated coupling between the alternating s pin chains. We deduce the minimal model containing such a frustration, and show that it gives an excellent account of the magnon dispersion, static su sceptibility, and electron-spin resonance absorption. We consider two-magno n states which bind due to frustration, and demonstrate that these may prov ide a consistent explanation for the second mode.