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Document type:
Zeitschriftenaufsatz 
Author(s):
Zheludev, A.; Masuda, T.; Tsukada, I.; Uchiyama, Y.; Uchinokura, K.; B̈oni, P.; Lee, S.-H. 
Title:
Magnetic Excitations in Coupled {{Haldane}} Spin Chains near the Quantum Critical Point 
Abstract:
Two quasi-one-dimensional S=1 quantum antiferromagnetic materials, PbNi2V2O8 and SrNi2V2O8, are studied by inelastic neutron scattering on powder samples. A simple model Hamiltonian is proposed for the two systems and used to analyze the data. Quantitative information on in-chain and interchain interactions obtained from this analysis is discussed in the context of qualitatively different ground-state properties: magnetic long-range order in SrNi2V2O8 and disordered ``spin liquid'' Haldane-gap s...    »
 
Journal title:
Physical Review B 
Year:
2000 
Journal volume:
62 
Month:
oct 
Journal issue:
13 
Pages contribution:
8921