Excitations and Possible Bound States in the S=1/2 Alternating Chain Compound (VO)2P2O7

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dc.creatorTennant, Alan
dc.creatorNagler, Stephen
dc.creatorBarnes, Ted
dc.creatorGarrett, Andrew
dc.creatorRiera, Jose
dc.creatorSales, Brian
dc.date1997-08-11
dc.date.accessioned2026-07-07T09:12:02Z
dc.date.available2026-07-07T09:12:02Z
dc.descriptionMagnetic excitations in an array of (VO)2P2O7 single crystals have been measured using inelastic neutron scattering. Until now, (VO)2P2O7 has been thought of as a two-leg antiferromagnetic Heisenberg spin ladder with chains running in the a-direction. The present results show unequivocally that (VO)2P2O7 is best described as an alternating spin-chain directed along the crystallographic b-direction. In addition to the expected magnon with magnetic zone-center energy gap DE = 3.1$ meV, a second excitation is observed at an energy just below 2DE. The higher mode may be a triplet two-magnon bound state. Numerical results in support of bound modes are presented.
dc.description8 pages of Latex with 5 ps figures, To accompany invited talk by Alan Tennant at ICNS 97 17-21st August 1997 in Toronto. Submitted to Physica B
dc.identifierhttps://arxiv.org/abs/cond-mat/9708078
dc.identifierhttp://arxiv.org/abs/cond-mat/9708078
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/151889
dc.subjectStatistical Mechanics
dc.subjectStrongly Correlated Electrons
dc.titleExcitations and Possible Bound States in the S=1/2 Alternating Chain Compound (VO)2P2O7
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