Comparisons of Performance Potentials of Silicon Nanowire and Graphene Nanoribbon MOSFETs Considering First-Principles Bandstructure Effects |
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Authors: | Tsuchiya H Ando H Sawamoto S Maegawa T Hara T Yao H Ogawa M |
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Affiliation: | Kobe University , Kobe, Japan; |
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Abstract: | In this paper, we investigate the performance potentials of silicon nanowire (SNW) and semiconducting graphene nanoribbon (GNR) MOSFETs by using first-principles bandstructures and ballistic current estimation based on the “top-of-the-barrier” model. As a result, we found that SNW-MOSFETs display a strong orientation dependence via the atomistic bandstructure effects, and 110]-oriented SNW-MOSFETs provide smaller intrinsic device delays than Si ultrathin-body MOSFETs when the wire size is scaled smaller than 3 nm. Furthermore, GNR-MOSFETs are found to exhibit promising device performance if the ribbon width is designed to be larger than a few nanometers and a finite band gap can be established. |
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