We present a numerical self-consistent variational approach based on the Jordan-Wigner transformation for two-dimensional spin systems. We apply it to the study of the well-known quantum (S = 1/2 ) antiferromagnetic XXZ system as a function of the easy-axis anisotropy Δ on a periodic square lattice. For the SU (2) case the method converges to a Néel ordered ground state irrespective of the input density profile used and in accordance with other studies. This shows the potential utility of the proposed method to investigate more complicated situations such as frustrated or disordered systems.
Información general
Fecha de publicación:28 de mayo de 2004
Idioma del documento:Inglés
Revista:Physical Review B; vol. 69, no. 18
Institución de origen:Facultad de Ciencias Exactas
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