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

Article

关键词: DIMENSIONAL HEISENBERG-ANTIFERROMAGNET;    NEUTRON-SCATTERING;    GAP ANTIFERROMAGNETS;    SIGMA-MODEL;    DYNAMICS;    CSNICL3;    INTEGER;    Y2BANIO5;    SYSTEMS;    CSMNI3;   

DOI  :  10.1103/PhysRevB.62.8921

来源: SCIE

【 摘 要 】

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.

【 授权许可】

Free