Mobility of circular and elliptical si nanowire transistors using a multi-subband 1d formalism

Medina-Bailon, C., Sadi, T., Nedjalkov, M., Carrillo-Nuñez, H., Lee, J., Badami, O., Georgiev, V. , Selberherr, S. and Asenov, A. (2019) Mobility of circular and elliptical si nanowire transistors using a multi-subband 1d formalism. IEEE Electron Device Letters, 40(10), pp. 1571-1574. (doi: 10.1109/LED.2019.2934349)

Abstract

We have studied the impact of the cross-sectional shape on the electron mobility of n-type silicon nanowire transistors (NWTs). We have considered circular and elliptical cross-section NWTs including the most relevant multisubband scattering processes involving phonon, surface roughness, and impurity scattering. For this purpose, we use a flexible simulation framework, coupling 3D Poisson and 2D Schrödinger solvers with the semi-classical Kubo-Greenwood formalism. Moreover, we consider cross-section dependent effective masses calculated from tight binding simulations. Our results show significant mobility improvement in the elliptic NWTs in comparison to the circular one for both 100 and 110 transport directions.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Asenov, Professor Asen and Lee, Mr Jaehyun and Medina Bailon, Miss Cristina and Carrillo-Nunez, Dr Hamilton and Badami, Mr Oves and Georgiev, Professor Vihar and Sadi, Dr Toufik
• Authors: Medina-Bailon, C., Sadi, T., Nedjalkov, M., Carrillo-Nuñez, H., Lee, J., Badami, O., Georgiev, V., Selberherr, S., and Asenov, A.
• College/School: College of Science and Engineering; College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: IEEE Electron Device Letters
• Publisher: IEEE
• ISSN: 0741-3106
• ISSN (Online): 0741-3106
• Published Online: 09 August 2019
• Copyright Holders: Copyright © 2019 IEEE
• First Published: First published in IEEE Electron Device Letters 40(10): 1571-1574
• Publisher Policy: Reproduced in accordance with the copyright policy of the publisher

Project Code	Award No	Project Name	Principal Investigator	Funder's Name	Funder Ref	Lead Dept
70370	1	SUPERAID7	Asen Asenov	European Commission (EC)	688101	ENG - ENGINEERING ELECTRONICS & NANO ENG