2011年8月12日
Determination of boundary scattering, magnon-magnon scattering, and the Haldane gap in Heisenberg spin chains
Physical Review B
- ,
- 巻
- 84
- 号
- 5
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1103/PhysRevB.84.054446
- 出版者・発行元
- AMER PHYSICAL SOC
Low-lying magnon dispersion in a S=1 Heisenberg antiferromagnetic (AF) chain is analyzed using the non-Abelian density-matrix-renormalization-group (DMRG) method. The scattering length ab of the boundary coupling and the intermagnon scattering length a are determined. The scattering length a b is found to exhibit a characteristic diverging behavior at the crossover point. In contrast, the Haldane gap Δ, the magnon velocity v, and a remain constant at the crossover. Our method allowed estimation of the gap of the S=2 AF chain to be Δ=0.0891623(9) using a chain length longer than the correlation length ξ. © 2011 American Physical Society.
- リンク情報
- ID情報
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- DOI : 10.1103/PhysRevB.84.054446
- ISSN : 1098-0121
- ISSN : 1550-235X
- eISSN : 2469-9969
- SCOPUS ID : 80052345041
- Web of Science ID : WOS:000293829200011