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Published November 15, 1989 | public
Journal Article Open

Observation of large peak-to-valley current ratios and large peak current densities in AlSb/InAs/AlSb double-barrier tunnel structures

Abstract

We report improved peak-to-valley current ratios and peak current densities in InAs/AlSb double-barrier, negative differential resistance tunnel structures. Our peak-to-valley current ratios are 2.9 at room temperature and 10 at liquid-nitrogen temperatures. Furthermore, we have observed peak current densities of 1.7×10^5 A/cm^2. These figures of merit are substantially better than previously reported values. The improvements are obtained by adding spacer layers near the barriers, thinner well regions, and thinner barriers.

Additional Information

Copyright © 1989 American Institute of Physics. Received 1 May 1989; accepted 1 August 1989. The authors gratefully acknowledge the support of the Air Force Office of Scientific Research under Grant No. 86-0306. One of us (J.R.S.) gratefully acknowledges the support of the Sweden-America Foundation. Another (D.H.C.) gratefully acknowledges the support provided by the TRW-PAT Fellowship.

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