Scheuerer, Roland, Renk, Karl Friedrich, Schomburg, Ekkehard, Wegscheider, Werner and Bichler, Max
(2002)
Nonlinear superlattice transport limited by Joule heating.
Journal of Applied Physics 92 (10), pp. 6043-6046.
Date of publication of this fulltext: 07 Dec 2009 13:21at publisher (via DOI)
Abstract
We studied the effects caused by Joule heating in GaAs/AlAs superlattices. We measured the current–voltage characteristics of superlattice mesas of different cross sections. Each current–voltage characteristic showed a corresponding peak current followed by a region of negative differential conductivity, according to miniband transport in the superlattice. We found that Joule heating in the mesa ...
Abstract
We studied the effects caused by Joule heating in GaAs/AlAs superlattices. We measured the current–voltage characteristics of superlattice mesas of different cross sections. Each current–voltage characteristic showed a corresponding peak current followed by a region of negative differential conductivity, according to miniband transport in the superlattice. We found that Joule heating in the mesa reduced the peak-current density. Current jumps in the region of negative differential conductivity disappeared for large cross-section mesas indicating a suppression of electron domains. The results are of significance for the development of high-power superlattice oscillators for submillimeter radiation.
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