A two-band tight-binding Hamiltonian is used to investigate the interaction between the energy bands of a periodic system in the presence of an electric field. Information on the existence of Stark-Wannier states and Stark ladders in this two-band system is obtained. The possibility of using a semiconductor superlattice device to experimentally observe Stark ladders and Zener tunnelling between the energy bands is also discussed.
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Leo et al. (1989) studied this question.
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