http://www.cnr.it/ontology/cnr/individuo/prodotto/ID179626
Magnetic susceptibility anisotropies in a two-dimensional quantum Heisenberg antiferromagnet with Dzyaloshinskii-Moriya interactions (Articolo in rivista)
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- Label
- Magnetic susceptibility anisotropies in a two-dimensional quantum Heisenberg antiferromagnet with Dzyaloshinskii-Moriya interactions (Articolo in rivista) (literal)
- Anno
- 2006-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1103/PhysRevB.73.045132 (literal)
- Alternative label
Silva Neto, MB (1) ; Benfatto, L (2); Juricic, V (1) ; Morais Smith, C (1) (2006)
Magnetic susceptibility anisotropies in a two-dimensional quantum Heisenberg antiferromagnet with Dzyaloshinskii-Moriya interactions
in Physical review. B, Condensed matter and materials physics
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Silva Neto, MB (1) ; Benfatto, L (2); Juricic, V (1) ; Morais Smith, C (1) (literal)
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- http://link.aps.org/doi/10.1103/PhysRevB.73.045132 (literal)
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- 1) Institute for Theoretical Physics, University of Utrecht, P.O. Box 80.195, 3508 TD, Utrecht, The Netherlands
2) SMC-INFM and Department of Physics, University of Rome \"La Sapienza,\" Piazzale Aldo Moro 5, 00185, Rome, Italy (literal)
- Titolo
- Magnetic susceptibility anisotropies in a two-dimensional quantum Heisenberg antiferromagnet with Dzyaloshinskii-Moriya interactions (literal)
- Abstract
- The magnetic and thermodynamic properties of the two-dimensional quantum Heisenberg antiferromagnet (QHAF) that incorporates both a Dzyaloshinskii-Moriya and pseudodipolar interactions are studied within the framework of a generalized nonlinear sigma model. We calculate the static uniform susceptibility and sublattice magnetization as a function of temperature and we show that (i) the magnetic response is anisotropic and differs qualitatively from the expected behavior of a conventional easy-axis QHAF; (ii) the Neel second-order phase transition becomes a crossover, for a magnetic field B perpendicular to CuO2 layers. We provide a simple and clear explanation for all the recently reported unusual magnetic anisotropies in the low-field susceptibility of La2CuO4 [L. N. Lavrov , Phys. Rev. Lett. 87, 017007 (2001)], and we demonstrate explicitly why La2CuO4 cannot be classified as an ordinary easy-axis antiferromagnet. (literal)
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