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- W1663465760 abstract "We report precision measurements of the effective mass m* in high-quality bilayer graphene using the temperature dependence of the Shubnikov-de Haas oscillations. In the density range of 0.7 x 10^12/cm^2 < n < 4.1 x 10^12 /cm^2, both the hole mass m*_h and the electron mass m*_e increase with increasing density, demonstrating the hyperbolic nature of the bands. The hole mass m*_h is approximately 20-30% larger than the electron mass m*_e. Tight-binding calculations provide a good description of the electron-hole asymmetry and yield an accurate measure of the inter-layer hopping parameter v_4 = 0.063. Both m*_h and m*_e are substantially suppressed compared to single-particle values, providing clear and unprecedented evidence for the strong renormalization effect of electron-electron interaction in the band structure of bilayer graphene." @default.
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- W1663465760 date "2011-08-22" @default.
- W1663465760 modified "2023-10-16" @default.
- W1663465760 title "Effective mass of electrons and holes in bilayer graphene: Electron-hole asymmetry and electron-electron interaction" @default.
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- W1663465760 doi "https://doi.org/10.1103/physrevb.84.085408" @default.
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