Complex bandstructure of direct bandgap III-V semiconductors: application to tunneling

Arvind Ajoy

doi:10.1117/12.926964

15 October 2012 Complex bandstructure of direct bandgap III-V semiconductors: application to tunneling

Arvind Ajoy

Proceedings Volume 8549, 16th International Workshop on Physics of Semiconductor Devices; 854923 (2012) https://doi.org/10.1117/12.926964
Event: 16th International Workshop on Physics of Semiconductor Devices, 2011, Kanpur, India

Abstract

Band to band tunneling in semiconductors fundamentally depends of the complex bandstructure of the semiconductor within its bandgap. In this work, the orientation dependent complex bandstructure of InSb, InAs, GaSb, InP and GaAs, and the orientation dependent probability of band to band tunneling in these materials have been computed using an sp³d⁵s^∗ tight binding model. These direct bandgap III-V materials are attractive candidates for Tunnel FETs. Comparison of our results with Kane’s two-band model commonly used in TCAD simulation, demonstrates the inaccuracies of the latter. Our results will be useful in the design of better performing Tunnel FETs in these materials.

Citation Download Citation

Arvind Ajoy "Complex bandstructure of direct bandgap III-V semiconductors: application to tunneling", Proc. SPIE 8549, 16th International Workshop on Physics of Semiconductor Devices, 854923 (15 October 2012); https://doi.org/10.1117/12.926964

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