Logo of Science Foundation Ireland  Logo of the Higher Education Authority, Ireland7 Capacities
Ireland's High-Performance Computing Centre | ICHEC
Home | News | Infrastructure | Outreach | Services | Research | Support | Education & Training | Consultancy | About Us | Login


Title:A Proposed Confinement Modulated Gap Nanowire Transistor Based on a Metal (Tin)
Authors:Lida Ansari, Giorgos Fagas, Jean-Pierre Colinge, and J. C. Greer, 2012
Abstract: Energy bandgaps are observed to increase with decreasing diameter due to quantum confinement in quasi-one-dimensional semiconductor nanostructures or nanowires. A similar effect is observed in semimetal nanowires for sufficiently small wire diameters: A bandgap is induced, and the semimetal nanowire becomes a semiconductor. We demonstrate that on the length scale on which the semimetal–semiconductor transition occurs, this enables the use of bandgap engineering to form a field-effect transistor near atomic dimensions and eliminates the need for doping in the transistor’s source, channel, or drain. By removing the requirement to supply free carriers by introducing dopant impurities, quantum confinement allows for a materials engineering to overcome the primary obstacle to fabricating sub-5 nm transistors, enabling aggressive scaling to near atomic limits.
ICHEC Project:First Principles Simulation of Junction-less Carbon Nanotube Field Effect Transistors (CNT-FETs)
Publication:Nano Lett., 2012, 12 (5), pp 2222–2227
URL: http://dx.doi.org/10.1021/nl2040817
Keywords: Ab initio calculations; electronic structure; electron transport; gray tin; nanowire transistor; quantum confinement
Status: Published

return to publications list