Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-05-08
Phys. Rev. Lett. 104, 236601 (2010)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
revtex, 5 pages, 3 figures, to appear in Phys. Rev. Lett.
Scientific paper
10.1103/PhysRevLett.104.236601
From a combination of careful and detailed theoretical and experimental studies, we demonstrate that the Boltzmann theory including all scattering mechanisms gives an excellent account, with no adjustable parameters, of high electric field transport in single as well as double-oxide graphene transistors. We further show unambiguously that scattering from the substrate and superstrate surface optical (SO) phonons governs the high field transport and heat dissipation over a wide range of experimentally relevant parameters. Models that neglect SO phonons altogether or treat them in a simple phenomenological manner are inadequate. We outline possible strategies for achieving higher current and complete saturation in graphene devices.
DaSilva Ashley M.
Jain Jainendra K.
Zhu Jia-Ji
Zou K.
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