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Article Dans Une Revue Physical Review Letters Année : 2014

Quantum Selection of Order in an X X Z Antiferromagnet on a Kagome Lattice

Résumé

Selection of the ground state of the kagome-lattice XXZ antiferromagnet by quantum fluctuations is investigated by combining nonlinear spin-wave and real-space perturbation theories. The two methods unanimously favor q = 0 over root 3 x root 3 magnetic order in a wide range of the anisotropy parameter 0 <= Delta less than or similar to 0.72. Both approaches are also in accord on the magnitude of the quantum order-by-disorder effect generated by topologically nontrivial, looplike spin-flip processes. A tentative S-Delta phase diagram of the model is proposed.

Dates et versions

hal-02095623 , version 1 (10-04-2019)

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A. L. Chernyshev, Mike E. Zhitomirsky. Quantum Selection of Order in an X X Z Antiferromagnet on a Kagome Lattice. Physical Review Letters, 2014, 113 (23), pp.237202. ⟨10.1103/PhysRevLett.113.237202⟩. ⟨hal-02095623⟩
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