The consideration of space charge in the analysis of resonant tunneling devices leads to a substantial modification of the current-voltage relationship. The region of negative differential resistance (NDR) is shifted to a higher voltage, and broadened along the voltage axis. Moreover, the peak value of current prior to NDR is reduced, leading to a reduction in the predicted peak-to-valley ratio. An approach is presented to include space-charge effects, and a recently fabricated GaAs-Alx Gal _ x As structure is analyzed, to underscore the importance of a self-consistent electrostatic potential in theoretical calculations.


Copyright (1987) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Appl. Phys. Lett, 50 (10), 9 March 1987 and may be found at http://dx.doi.org/10.1063/1.98097. The following article has been submitted to/accepted by Applied Physics Letters. Copyright (1987) M. Cahay, M. McLennan, S. Datta, and M. S. Lundstrom. This article is distributed under a Creative Commons Attribution 3.0 Unported License.

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Appl. Phys. Lett, 50 (10), 9 March 1987



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