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Quantum phase transition induced by Dzyaloshinskii-Moriya interactions in the kagome antiferromagnet

Authors Cépas, O.
Fong, C. M.
Leung, P. W.
Lhuillier, C.
Issue Date 2008
Source PHYSICAL REVIEW B, v. 78, (14), 2008, Oct, article number 140405
Summary We argue that the S=1/2 kagome antiferromagnet undergoes a quantum phase transition when the Dzyaloshinskii-Moriya coupling is increased. For D < D-c the system is in a moment-free phase, and for D>D-c the system develops antiferromagnetic long-range order. The quantum critical point is found to be D-c similar or equal to 0.1J using exact diagonalizations and finite-size scaling. This suggests that the kagome compound ZnCu3(OH)(6)Cl-3 may be in a quantum critical region controlled by this fixed point.
ISSN 1098-0121
Rights Physical Review B © copyright 2008 American Physical Society. The journal's web site is located at
Language English
Format Article
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