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- W2017254101 abstract "We develop a theory for the energy relaxation of hot Dirac fermions in graphene. We obtain a generic expression for the energy relaxation rate due to electron-phonon interaction and calculate the power loss due to both optical and acoustic phonon emission as a function of electron temperature ${T}_{text{e}}$ and density $n$. We find an intrinsic power loss weakly dependent on carrier density and nonvanishing at the Dirac point $n=0$, originating from interband electron-optical phonon scattering by the intrinsic electrons in the graphene valence band. We obtain the total power loss per carrier $ensuremath{sim}{10}^{ensuremath{-}12}--{10}^{ensuremath{-}7}text{ }text{W}$ within the range of electron temperatures $ensuremath{sim}20--1000text{ }text{K}$. We find optical (acoustic) phonon emission to dominate the energy loss for ${T}_{text{e}}>(<)200--300text{ }text{K}$ in the density range $n={10}^{11}--{10}^{13}text{ }{text{cm}}^{ensuremath{-}2}$." @default.
- W2017254101 created "2016-06-24" @default.
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- W2017254101 date "2009-06-09" @default.
- W2017254101 modified "2023-10-02" @default.
- W2017254101 title "Energy relaxation of hot Dirac fermions in graphene" @default.
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- W2017254101 doi "https://doi.org/10.1103/physrevb.79.235406" @default.
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