A multisubband self-consistent two-dimensional numerical model for Hemt including intersubband and intrasubband scattering mechanisms in the quantum well

The previous one-subband model is extended to include transport of electrons in the quantum well with two subbands. The two higher moments of Boltzmann Transport Equations are solved for the two lowest subbands and the bulk system. The Schrodinger's and Poisson's Equations are solved self-consistently. The wavefunctions obtained are used to calculate the ionized impurity and the polar optical-phonon scattering mechanisms. The scattering rates obtained are in good agreement with those reported by Yokoyama and Hess. Coupling terms between the two subbands in the quantum well and the bulk system are derived from the scattering rates; We obtain lower transconductance and unity gain frequency which were overestimated in the previous model. At a gate bias of 0.625 V, we obtained a transconductance of 316 mS/mm, a gate capacitance of 17.68 pF/cm, and a unity-gain frequency of 28.44 GHz. (Abstract shortened with permission of author.).

Name thesis:degree_name

Master of Science (MS)

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Computer Science and Electrical Engineering

Grantor dc:publisher

University of Nevada, Las Vegas

Year

1991

Author dc:creator

• Arman, Helen

Contributors dc:contributor

• Abdol Rahim Khoie

Statement dc:rights

• IN COPYRIGHT. For more information about this rights statement, please visit http://rightsstatements.org/vocab/InC/1.0/

Language dc:language

English

Identifier

https://oasis.library.unlv.edu/rtds/139

OAI identifier oai:identifier

oai:oasis.library.unlv.edu:rtds-1138