Journal
MRS BULLETIN
Volume 42, Issue 7, Pages 506-510Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1557/mrs.2017.141
Keywords
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Funding
- Singapore Ministry of Education T2 Grant [T2MOE1401]
- USA AFOSR AOARD Grant [FA2386-14-1-4020]
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The theories of thermionic emission and field emission (also known as the Richardson-Dushman [RD] and Fowler-Nordheim [FN] Laws, respectively) were formulated more than 80 years ago for bulk materials. In single-layer graphene, electrons mimic massless Dirac fermions and follow relativistic carrier dynamics. Thus, their behavior deviates significantly from the nonrelativistic electrons that reside in traditional bulk materials with a parabolic energy-momentum dispersion relation. In this article, we assert that due to linear energy dispersion, the traditional thermionic emission and field emission models are no longer valid for graphene and two-dimensional Dirac-like materials. We have proposed models that show better agreement with experimental data and also show a smooth transition to the traditional RD and FN Laws.
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