Journal
IEEE TRANSACTIONS ON ELECTRON DEVICES
Volume 54, Issue 4, Pages 677-682Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TED.2007.891872
Keywords
ballistic; bandstructure; carbon; current density; graphite; MOSFET; nanotechnology; nanowire; quantum confinement
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The upper limit performance potential of ballistic carbon nanoribbon MOSFETs (CNR MOSFETs) is examined. We calculate the bandstructure of nanoribbons using a single p(z)-orbital tight-binding method and evaluate the current-voltage characteristics of a nanoribbon MOSFET using a semiclassical ballistic model. We find that semiconducting ribbons. a few nanometers in width behave electronically in a manner similar to carbon nanotubes, achieving similar ON-current performance. Our calculations show that semiconducting CNR transistors can be candidates for high-mobility digital switches, with the potential to outperform the silicon MOSFET. Although wide ribbons have small bandgaps, which would increase subthreshold leakage due to band to band tunneling, their ON-current capabilities could still be attractive for certain applications.
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