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Dynamics of electric field domain walls in semiconductor superlattices

AuthorsSánchez, David ; Moscoso, M.; Bonilla, Luis L. ; Platero, Gloria ; Aguado, Ramón
Issue Date2000
CitationPhysica E: Low-Dimensional Systems and Nanostructures 7: 299-301 (2000)
AbstractA self-consistent microscopic model of sequential tunneling in superlattices is employed to investigate self-sustained current oscillations. Current spikes - high-frequency modulation due to well-to-well hopping of charge monopole domain walls - are naturally reproduced. Moreover, as the contact doping shrinks, the recycling and motion of charge dipoles resulting in a lower-frequency oscillatory mode is predicted. For low contact doping, this mode dominates and monopole oscillations disappear. At intermediate doping, hysteresis between both the oscillatory modes may be possible.
Identifiersdoi: 10.1016/S1386-9477(99)00311-2
issn: 1386-9477
Appears in Collections:(ICMM) Artículos
(IMEDEA) Artículos
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