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25 April 2024

» pubmed » pmid16605587

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Field-induced Berezinskii-Kosterlitz-Thouless transition and string-density plateau in the anisotropic triangular antiferromagnetic Ising model
Hiromi Otsuka ; Yutaka Okabe ; Kouichi Okunishi ;
Date:	28 Feb 2006
Journal:	Phys Rev E, 73 (3 Pt 2), 035105
Abstract:	The field-induced Berezinskii-Kosterlitz-Thouless (BKT) transition in the ground state of the triangular antiferromagnetic Ising model is studied by the level-spectroscopy method. We analyze dimensions of operators around the BKT line, and estimate the BKT point H(c) approximately equal to 0.5229 +/-0.001, which is followed by the level-consistency check to demonstrate the accuracy of our estimate. Further we investigate the anisotropic case to clarify the stability of the field-induced string-density plateau against an incommensurate liquid state by the density-matrix renormalization-group method.
Source:	PubMed, pmid16605587
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