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|Title: ||Quantum phase transition induced by Dzyaloshinskii-Moriya interactions in the kagome antiferromagnet|
|Authors: ||Cépas, O.|
Fong, C. M.
Leung, Pak Wo
|Keywords: ||Antiferromagnetic materials|
|Issue Date: ||23-Oct-2008 |
|Citation: ||Physical review B, v. 78, iss. 14, p. 140405, 2008|
|Abstract: ||We argue that the S=1/2 kagome antiferromagnet undergoes a quantum phase transition when the Dzyaloshinskii-Moriya coupling is increased. For D<Dcthe system is in a moment-free phase, and for D>Dc the system develops antiferromagnetic long-range order. The quantum critical point is found to be Dc≈0.1J using exact diagonalizations and finite-size scaling. This suggests that the kagome compound ZnCu3(OH)6Cl3 may be in a quantum critical region controlled by this fixed point.|
|Rights: ||Physical Review B © copyright 2008 American Physical Society. The journal's web site is located at http://prb.aps.org|
|Appears in Collections:||PHYS Journal/Magazine Articles|
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