Dynamics of the two-dimensional Heisenberg antiferromagnet in an external magnetic field |
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| Authors: | L. S. Lima A. S. T. Pires |
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| Affiliation: | 1.Centro Brasileiro de Pesquisas Físicas, CEP:22290-180,Rio de Janeiro,Brazil;2.Departamento de Física, ICEx,Universidade Federal de Minas Gerais, CEP:31270-901,Belo Horizonte,Brazil |
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| Abstract: | In this paper we study the dynamics of the two-dimensional Heisenberg antiferromagnet in an external magnetic field at zero temperature, using the memory function formalism. The imaginary part of the memory function, which is related to the damping, shows a one peak structure. The dynamical structure factor shows a smooth peak well defined separated from another very small peak. |
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