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Three-dimensional simulations of quantum transport in semiconductor nanostructures

Ting, D. Z.-Y. and Kirby, S. K. and McGill, T. C. (1993) Three-dimensional simulations of quantum transport in semiconductor nanostructures. Journal of Vacuum Science and Technology B, 11 (4). pp. 1738-1742. ISSN 1071-1023. http://resolver.caltech.edu/CaltechAUTHORS:TINjvstb93

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Abstract

We introduce the planar supercell method as a means for treating three-dimensional quantum transport in mesoscopic tunnel structures. Our model treats potential variations along the growth direction as well as the lateral directions. The flexibility of the method allows us to examine a variety of physical phenomena relevant to quantum transport, including alloy disorder, interface roughness, defect impurities, and zero-dimensional, one-dimensional, and two-dimensional quantum confinement, in a variety of device geometries ranging from double barrier heterostructures to quantum wire electron waveguides. Using this method, we have studied the transport properties of double barrier heterostructures with alloy barriers, including the effect of clustering in the alloy layers. We have also examined interface roughness in double barrier structures, and analyzed k|| scattering and lateral localization. In addition, we have studied the transport properties of a quantum wire electron waveguide, and explored its sensitivity to the geometry of waveguide openings.


Item Type:Article
Additional Information:© 1993 American Vacuum Society. (Received 3 February 1993; accepted 24 March 1993) The authors would like to thank Eric Van de Velde, W.L. Johnson, and W.R. Frensley for helpful discussions. S.K.K. would like to thank the Office of Naval Research for graduate fellowship support during this research. This work was supported by the Office of naval Research (ONR) under Grant No. N00014-89-J-1141.
Subject Keywords:SIMULATION; THREE–DIMENSIONAL CALCULATIONS; SEMICONDUCTOR MATERIALS; NANOSTRUCTURES; TUNNEL EFFECT; QUANTUM MECHANICS; ROUGHNESS; INTERFACES; RANDOMNESS; CONFINEMENT; HETEROSTRUCTURES; QUANTUM WIRES; WAVEGUIDES; CALCULATION METHODS; POTENTIAL BARRIER; RESONANCE
Record Number:CaltechAUTHORS:TINjvstb93
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:TINjvstb93
Alternative URL:http://dx.doi.org/10.1116/1.586472
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10836
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:12 Jun 2008
Last Modified:26 Dec 2012 10:05

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