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Two-dimensional antiferromagnet in an external staggered field |
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| Authors: | M.P.P. Fonseca A.S.T. Pires |
| Affiliation: | Departamento de Física, Universidade Federal de Minas Gerais, C.P. 702, 30123-970, Belo Horizonte, MG, Brazil |
| Abstract: | We calculate the temperature-dependent energy gap in the magnetic excitations spectrum of the two-dimensional antiferromagnet in the presence of a staggered magnetic field, using the nonlinear sigma model. |
| Keywords: | 75.50.Ee 75.30.Kz |
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