Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session Q34: Semiconductor Materials for Beyond CMOS Electronics
3:00 PM–5:36 PM,
Wednesday, March 8, 2023
Room: Room 226/227
Sponsoring
Unit:
FIAP
Chair: Yong Zhong, Stanford University
Abstract: Q34.00006 : Image force derivation and application to two-dimensional materials contacts*
4:00 PM–4:12 PM
Presenter:
Emeric Deylgat
(The University of Texas at Dallas)
Authors:
Emeric Deylgat
(The University of Texas at Dallas)
Sarah R Evans
(University of Texas at Dallas)
Edward Chen
(Taiwan Semiconductor Manufacturing Company)
Massimo V Fischetti
(University of Texas at Dallas)
Bart Soree
(IMEC)
William G. Vandenberghe
(University of Texas at Dallas)
Most models do not include the image-force barrier lowering (IFBL) that arises due to electrons in the TMD being attracted to the image charge in the metal. We derive an analytical expression for the IFBL of metal wedges of angle $Omega$ using the Kontorovich-Lebedev transform to expand the solutions of the Poisson equation in cylindrical coordinates. We show that the IFBL can also be calculated using the method of images by mapping the wedge geometry to a parallel plate using a conifold geometry. We find that for large opening angle $Omega$, the electric field lines due to metal surface charge are spread out more compared to smaller opening angles leading to less IFBL at large opening angles.
We develop a semi-classical transport model based on the Bardeen transfer method to calculate the contact resistance in top contacts adding the IFBL to the depletion potential arising from the Schottky contact. We calculate and compare the contact resistance with and without the IFBL. We find that including the IFBL improves the contact resistance up to 30 times at n-type doping of $sim 10^{11}$ cm$^{-2}$.
*This work has been supported by the Taiwan Semiconductor Manufacturing Company, Ltd. and the NEWLIMITS/nCORE program of the Semiconductor Research Corporation (SRC), USA.
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700