|
Title
|
|
|
|
Energy filtering in silicon nanowires and nanosheets using a geometric superlattice and its use for steep-slope transistors
|
|
|
Author
|
|
|
|
|
|
|
Abstract
|
|
|
|
| This paper investigates energy filtering in silicon nanowires and nanosheets by resonant electron tunneling through a geometric superlattice. A geometric superlattice is any kind of periodic geometric feature along the transport direction of the nanowire or nanosheet. Multivalley quantum-transport simulations are used to demonstrate the manifestation of minibands and minibandgaps in the transmission spectra of such a superlattice. We find that the presence of different valleys in the conduction band of silicon favors a nanowire with a rectangular cross section for effective energy filtering. The obtained energy filter can consequently be used in the source extension of a field-effect transistor to prevent high-energy electrons from contributing to the leakage current. Self-consistent Schrodinger-Poisson simulations in the ballistic limit show minimum subthreshold swings of 6 mV/decade for geometric superlattices with indentations. The obtained theoretical performance metrics for the simulated devices are compared with conventional III-V superlatticeFETs and TunnelFETs. The adaptation of the quantum transmitting boundary method to the finite-element simulation of 3-D structures with anisotropic effective mass is presented in Appendixes A and B. Our results bare relevance in the search for steep-slope transistor alternatives which are compatible with the silicon industry and can overcome the power-consumption bottleneck inherent to standard CMOS technologies. Published by AIP Publishing. |
|
|
|
Language
|
|
|
|
English
|
|
|
Source (journal)
|
|
|
|
Journal of applied physics / American Institute of Physics. - New York, N.Y., 1937, currens
|
|
|
Publication
|
|
|
|
New York, N.Y.
:
American Institute of Physics
,
2018
|
|
|
ISSN
|
|
|
|
0021-8979
[print]
1089-7550
[online]
|
|
|
DOI
|
|
|
|
10.1063/1.5043543
|
|
|
Volume/pages
|
|
|
|
124
:14
(2018)
, 10 p.
|
|
|
Article Reference
|
|
|
|
144304
|
|
|
ISI
|
|
|
|
000447148100011
|
|
|
Medium
|
|
|
|
E-only publicatie
|
|
|
Full text (Publisher's DOI)
|
|
|
|
|
|
|
Full text (publisher's version - intranet only)
|
|
|
|
|
|