Abstract
Effect of the electron–phonon interactions on the property of dynamical localization of semiconductor superlattices in a single-band model under the actions of the dc and ac electric field, respectively, is investigated. The results show that the electron–phonon interactions can destroy the dynamical localization of the electron. For the same phonon frequency, when the strength of the electron–phonon interactions becomes larger, the electron is more quickly scattered. When the phonon frequency equals to the Bloch frequency ΩB in dc field or ω in ac field or one of them in dc-ac field, the electron initially localized at the 0th site can be rapidly scattered to the other sites, where ω is the frequency of the ac field. The property of the dynamical localization of the electron can be seriously changed by the photon–phonon resonant field.
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