Temperature dependence of the gap in the S=1/2 antiferromagnetic chain in the presence of a staggered field |
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| Authors: | AST Pires |
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| Institution: | Departamento de Fisica, Universidade Federal de Minas Gerais, CP 702, 30123-970 Belo Horizonte MG, Brazil |
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| Abstract: | We calculate the temperature dependent energy gap in the magnetic excitation spectrum of the one-dimensional spin 1/2 antiferromagnetic Heisenberg model in the presence of a staggered magnetic field, using the phase Hamiltonian, a self consistent harmonic approximation, and the thermal-Green function technique. |
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| Keywords: | 75 10 Jm |
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