Magnetic Excitations in Coupled {{Haldane}} Spin Chains near the Quantum Critical Point

Dokumenttyp:: Zeitschriftenaufsatz
Autor(en):: Zheludev, A.; Masuda, T.; Tsukada, I.; Uchiyama, Y.; Uchinokura, K.; B̈oni, P.; Lee, S.-H.
Titel:: 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 state in PbNi2V2O8. «
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... »
Zeitschriftentitel:: Physical Review B
Jahr:: 2000
Band / Volume:: 62
Monat:: oct
Heft / Issue:: 13
Seitenangaben Beitrag:: 8921
Volltext / DOI:: doi:10.1103/PhysRevB.62.8921
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