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X-point tunneling in AlAs–GaAs–AlAs double barrier heterostructures

Ting, D. Z.-Y. and McGill, T. C. (1989) X-point tunneling in AlAs–GaAs–AlAs double barrier heterostructures. Journal of Vacuum Science and Technology B, 7 (4). pp. 1031-1034. ISSN 1071-1023. http://resolver.caltech.edu/CaltechAUTHORS:TINjvstb89

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Abstract

The dynamics of X-point tunneling in AlAs–GaAs–AlAs double barrier heterostructures is studied with numerical simulation. The problem is formulated within the framework of the one-band Wannier orbital model which allows for simultaneous descriptions of the Gamma-point double barrier profile and the X-point double well profile in this heterostructure. Time dependences of the following processes are illustrated: (i) resonant tunneling of Gamma-valley electron packets via the X-point quantum well states localized in the AlAs layers, (ii) nonresonant tunneling of Gamma-electron packets (with energy below the AlAs Gamma-point barrier) through the X-point continuum states, and (3) resonant tunneling via Gamma-X mixed quantum well states localized in both the GaAs Gamma-point quantum well and the AlAs X-point double quantum well. In addition, the effects of X-point tunneling on the escape times of electrons localized in the GaAs quantum wells are examined.


Item Type:Article
Additional Information:© 1989 American Vacuum Society. (Received 7 April 1989; accepted 14 April 1989) The authors would like to thank M.K. Jackson, D.H. Chow, and E.T. Yu for helpful discussions. This work is supported by the U.S. Office of Naval Research (ONR) under Grant No. N00014-89-J-1141.
Subject Keywords:ALUMINUM ARSENIDES; GALLIUM ARSENIDES; LAYERED MATERIALS; HETEROSTRUCTURES; TUNNEL EFFECT; NUMERICAL SOLUTION; SIMULATION; BARRIER HEIGHT; TIME DEPENDENCE; RESONANCE; BAND STRUCTURE; MATHEMATICAL MODELS
Record Number:CaltechAUTHORS:TINjvstb89
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:TINjvstb89
Alternative URL:http://dx.doi.org/10.1116/1.584796
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10839
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:12 Jun 2008
Last Modified:26 Dec 2012 10:05

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