Numerical Study of Weak Ferromagnetism in 2D J1-J2 Heisenberg Model with Dzyaloshinskii-Moriya Interaction |
| A. Voigt and J. Richter Institut für Theoretische Physik, Otto-von-Guericke-Universität, Postfach 4120, 39016 Magdeburg, Germany |
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| By means of exact diagonalization we consider the groundstate of the J1-J2 spin 1/2 Heisenberg model with an anisotropic interaction term of Dzyaloshinskii-Moriya type. We find that a Dzyaloshinskii-Moriya interaction may create a weak ferromagnetic moment. The interplay between the quantum nature of the groundstate of the pure J1-J2 model and the anisotropic Dzyaloshinskii-Moriya interaction favour energetically a well-defined direction of spin alignment creating anisotropic correlations. |
| DOI: 10.12693/APhysPolA.91.371 PACS numbers: 75.10.Jm, 75.30.Gw, 05.50.+q |