Numerical diagonalization study of an S=1/2 ladder model with open boundary conditions

Hiroshi Watanabe*

*Corresponding author for this work

Research output: Contribution to journalArticle

38 Scopus citations

Abstract

Low-lying energy states of an S=1/2 ladder model are investigated by applying the numerical diagonalization method to finite clusters. This model has the antiferromagnetic intrachain coupling J (J>0) and the ferromagnetic interchain one -J (>0). Both the inverse correlation length -1() and an energy gap are shown to be finite at least for 0.05, the former of which is shown to approach the same value as that of the S=1 antiferromagnetic Heisenberg chain with increasing . A generation mechanism of the gap is also discussed in terms of a simple model by using the Lieb-Mattis theorem.

Original languageEnglish
Pages (from-to)13442-13448
Number of pages7
JournalPhysical Review B
Volume50
Issue number18
DOIs
StatePublished - 1 Jan 1994

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