Abstract:By means of the diagrammatic techniques for nonequilibrium processes proposed by Keldysh and adopting a simple one-band tight-binding Hamiltonian, we study the resonant tunneling in GaAs/ Al x Ga 1 À x As double-barrier heterostructures (DBH) in the presence of a magnetic field applied parallel to the current direction in this work. We have found that the number of Landau levels that contribute to the resonant tunneling diminishes with the magnetic field, all centered around the position of the resonance. Also… Show more
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