Abstract
Based on the Peierls-Hubbard Hamiltonian, the influence of electron-phonon interaction on the spin excitation of itinerant systems has been analyzed. It is shown that the interaction not only changes the dynamic response properties, but also decreases the gap between two spin subbands, which makes the electron-hole pairs easy to be excited singly. It should be emphasized that the spin excitation spectrum has an energy gap due to the presence of the electron-phonon interaction mentioned above.
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