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Finite-Field Ground State of an S=1 Anisotropic Antiferromagnetic Chain(Low Dimensional Systems, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)

Takashi Tonegawa, Kouichi Okunishi, Tôru Sakai +1 more

Progress of Theoretical Physics SupplementOct 31, 20050 citations

Effect of Staggered Field on the Magnetization Process of S=1/2 Antiferromagnetic Chains(Low Dimensional Systems, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)

Akira Matsuo, Kohei Hosokawa, Yasuo Narumi +7 more

Progress of Theoretical Physics SupplementOct 31, 20050 citations

Dynamical properties of S=1 bond-alternating Heisenberg chains at finite temperatures

Takahumi Suzuki, Sei-ichiro Suga

arXiv:cond-mat/0505735Physics Letters AJun 30, 20051 citation

Dynamical Structure Factors ofS= 1 Bond-Alternating Heisenberg Chains at Finite Temperatures

Takahumi Suzuki, Sei-ichiro Suga

Dynamical structure factors of the S =1 bond-alternating spin chains in the dimer state are calculated at finite temperature using the pair dynamical correlated-effective-field approximation. At T =0, the delta-function-type peak corresponding to the one-magnon mode appears. When temperature increases, such a sharp peak is broadened and the additional weak peak caused by the excitation from the triplet state to the quintet state emerges in the higher energy region. The results are discussed in comparison with those obtained by the exact diagonalization method.Dynamical structure factors of the S =1 bond-alternating spin chains in the dimer state are calculated at finite temperature using the pair dynamical correlated-effective-field approximation. At T =0, the delta-function-type peak corresponding to the one-magnon mode appears. When temperature increases, such a sharp peak is broadened and the additional weak peak caused by the excitation from the triplet state to the quintet state emerges in the higher energy region. The results are discussed in comparison with those obtained by the exact diagonalization method.

Progress of Theoretical Physics SupplementJan 1, 20050 citations

Finite-temperature dynamical structure factor of alternating Heisenberg chains

A. J. A. James, Fabian H. L. Eßler, Robert Konik

We develop a low-temperature expansion for the finite-temperature dynamical structure factor of the spin half Heisenberg chain with alternating nearest-neighbor exchange in the limit of strong alternation of the exchange constants. We determine both the broadening of the low-lying triplet lines and the contribution of the thermally activated intraband scattering.

arXiv:0810.0828Physical Review BSep 16, 200839 citations

Dynamics of the quantum one-dimensional Heisenberg antiferromagnet with spin S=1 at low temperature

Antonio S. T. Pires, M. E. Gouvêa

Journal of Magnetism and Magnetic MaterialsMar 1, 200215 citations

Dynamical Structure Factors of S=1 Bond-Alternating Heisenberg Chains at Finite Temperatures(Low Dimensional Systems, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)

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Dynamical Structure Factors of S=1 Bond-Alternating Heisenberg Chains at Finite Temperatures(Low Dimensional Systems, Field-Induced Phase Transitions and Dynamics in Quantum Spin Systems)

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