High-field perpendicular conduction in GaAs/AlAs superlattices
- 9 January 1989
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 54 (2) , 165-167
- https://doi.org/10.1063/1.101217
Abstract
Miniband conduction in undoped GaAs/AlAs superlattices (SLs) has been investigated through current-voltage measurements on n+-SL-n+ structures. From the comparison with simulations based on an effective medium approximation for the conduction through the superlattice, we directly obtain the field dependence of the electron velocity perpendicular to the layers. Our data show strong evidence of negative differential velocity in a 35.5/20 Å (well/barrier width) SL.Keywords
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