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http://hdl.handle.net/1783.1/6038
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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
Lhuillier, C. |
| Keywords: | Antiferromagnetic materials
copper compounds
Heisenberg model
Magnetic transitions
Zinc compounds |
| 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 |
| URI: | http://hdl.handle.net/1783.1/6038 |
| Appears in Collections: | PHYS Journal/Magazine Articles
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| quan_ph.pdf | | 93Kb | Adobe PDF | View/Open |
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