Magnetic excitations in coupled Haldane spin chains near the quantum critical point

Authors
Zheludev, A Masuda, T Tsukada, I Uchiyama, Y Uchinokura, K Boni, P Lee, SH
Citation
A. Zheludev et al., Magnetic excitations in coupled Haldane spin chains near the quantum critical point, PHYS REV B, 62(13), 2000, pp. 8921-8930
Citations number
32
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
62
Issue
13
Year of publication
2000
Pages
8921 - 8930
Database
ISI
SICI code
0163-1829(20001001)62:13<8921:MEICHS>2.0.ZU;2-K
Abstract
Two quasi-one-dimensional S = 1 quantum antiferromagnetic materials, PbNi2V 2O8 and SrNi2V2O8, are studied by inelastic neutron scattering on powder sa mples. A simple model Hamiltonian is proposed for the two systems and used to analyze the data. Quantitative information on in-chain and interchain in teractions obtained from this analysis is discussed in the context of quali tatively different ground-state properties: magnetic long-range order in Sr Ni2V2O8 and disordered "spin liquid" Haldane-gap state in PbNi2V2O8.