Abstract
Resonant tunneling transmission is studied theoretically for symmetrical rectangular quadruple-barrier structures with deep triple wells. Analytical expressions for the transmission coefficient and the resonance condition are derived for the first time. Two desired resonance levels may be obtained almost independently by selecting appropriate values of well width, which may be favorable for resonant tunneling device fabrication. The transmission coefficient versus electron energy is investigated, and it is shown analytically that the transmission spectrum is Lorentzian in shape near energies of resonance. Wave functions of an electron at the resonance level are examined, and the confining phenomenon is studied.
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