Onset of incommensurability in quantum spin chains

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20 Citations (Scopus)


In quantum spin chains, it has been observed that the incommensurability occurs near valence-bond-solid (VBS)-type solvable points, and the correlation length becomes shortest at VBS-type points. In addition, the correlation function decays purely exponentially at VBS-type points, in contrast with the two-dimensional (2D) Ornstein-Zernicke type behavior in other regions with an excitation gap. We propose a mechanism to explain the onset of the incommensurability and the shortest correlation length at VBS-like points. This theory can be applied to more general cases.

Original languageEnglish
Pages (from-to)476-478
Number of pages3
Journaljournal of the physical society of japan
Issue number3
Publication statusPublished - Mar 2003

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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