Suppression of sequential tunneling current by a perpendicular magnetic field in a three-barrier, two-well heterostructure

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Abstract
When an intersubband relaxation is involved in vertical transport in a tunnelingheterostructure, the magnetic suppression of the intersubband LO or LA phononscattering may also give rise to a noticeable depression of the resonant tunneling current, unrelated to the Coulomb correlation effect. The slowdown of the intersubband scattering rate makes fewer electrons able to tunnel resonantly between two adjacent quantum wells(QWs) in a three-barrier, two-well heterostructure. The influence of the magnetic field on the intersubband relaxation can be studied in an explicit way by a physical model based on the dynamics of carrier populations in the ground and excited subbands of the incident QW.