Onset of Incommensurability in Quantum Spin Chains

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概要

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• 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.

• 社団法人日本物理学会の論文
• 2003-03-15

著者

• Nomura Kiyohide

  Department Of Physics Kyushu Univercity

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• Phase Transitions of S=3/2 and S=2 XXZ Spin Chains with Bond Alternation
• Critical Properties of S=1 Bond-Alternating XXZ Chains and Hidden Z_2×Z_2 Symmetry
• Berezinskii-Kosterlitz-Thouless Transition of Spin-1 XXZ Chains in a Staggered Magnetic Field
• Onset of Incommensurability in Quantum Spin Chains

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