| Autor: |
Scheuerer, R., Renk, K. F., Schomburg, E., Wegscheider, W., Bichler, M. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 11/15/2002, Vol. 92 Issue 10, p6043, 4p, 1 Diagram, 3 Graphs |
| Abstrakt: |
We studied the effects caused by Joule heating in GaAs/A1As superlattices. We measured the current-voltage characteristics of superlattice mesas of different cross sections. Each currentvoltage 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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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