Phonon-assisted tunneling in asymmetric resonant tunneling structures

10/1998; DOI: 10.1071/PH99037
Source: arXiv

ABSTRACT Based on the dielectric continuum model, we calculated the phonon assisted
tunneling (PAT) current of general double barrier resonant tunneling structures
(DBRTSs) including both symmetric and antisymmetric ones. The results indicate
that the four higher frequency interface phonon modes (especially the one which
peaks at either interface of the emitter barrier) dominate the PAT processes,
which increase the valley current and decrease the PVR of the DBRTSs. We show
that an asymmetric structure can lead to improved performance.

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