Room Temperature All Semiconducting sub-10nm Graphene Nanoribbon Field-Effect Transistors

Physics – Condensed Matter – Mesoscale and Nanoscale Physics

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16 pages, 4 figures. Phys. Rev. Lett. in press

Scientific paper

10.1103/PhysRevLett.100.206803

Sub-10nm wide graphene nanoribbon field-effect transistors (GNRFETs) are studied systematically. All sub-10nm GNRs afforded semiconducting FETs without exception, with Ion/Ioff ratio up to 10^6 and on-state current density as high as ~2000uA/um. We estimated carrier mobility ~200cm2/Vs and scattering mean free path ~10nm in sub-10nm GNRs. Scattering mechanisms by edges, acoustic phonon and defects are discussed. The sub-10nm GNRFETs are comparable to small diameter (d<=~1.2nm) carbon nanotube FETs with Pd contacts in on-state current density and Ion/Ioff ratio, but have the advantage of producing all-semiconducting devices.

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