論文

査読有り 筆頭著者 責任著者
2011年8月12日

Determination of boundary scattering, magnon-magnon scattering, and the Haldane gap in Heisenberg spin chains

Physical Review B
  • Hiroshi Ueda
  • ,
  • Koichi Kusakabe

84
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
DOI
https://doi.org/10.1103/PhysRevB.84.054446
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000293829200011&DestApp=WOS_CPL
ID情報
  • DOI : 10.1103/PhysRevB.84.054446
  • ISSN : 1098-0121
  • ISSN : 1550-235X
  • eISSN : 2469-9969
  • SCOPUS ID : 80052345041
  • Web of Science ID : WOS:000293829200011

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