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- W2024486235 abstract "We discuss a competition between a spin-Peterls state and the antiferromagnetic state for a Heisenberg antiferromagnetic linear chain system including a phonon Hamiltonian. A Hartree-Fock approximation is applied to a Hamiltonian redescribed in terms of spin-less fermions. We get Dyson's equation of phonons which is consistent with this Hartree-Fock approximation. We point out that Pytte's work is not still complete even in the framework of the Hartree-Fock theory since a term was left out there which gave a quantitative difference between the Heisenberg model and the X Y model. We find the softening of phonons in the antiferromagnetic state which has overcome the spin-Peierls state." @default.
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- W2024486235 date "1984-03-01" @default.
- W2024486235 modified "2023-09-30" @default.
- W2024486235 title "Spin-Peierls Instabilities vs Antiferromagnetic Transition and Phonon Dynamics" @default.
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- W2024486235 doi "https://doi.org/10.1143/jpsj.53.1087" @default.
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