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- W1966303445 abstract "Single-layer graphene sheets are typically characterized by long-wavelength corrugations (ripples) which can be shown to be at the origin of rather strong potentials with both scalar and vector components. We present an extensive microscopic study, based on a self-consistent Kohn-Sham-Dirac density-functional method, of the carrier-density distribution in the presence of these ripple-induced external fields. We find that spatial density fluctuations are essentially controlled by the scalar component, especially in nearly neutral graphene sheets, and that in-plane atomic displacements are as important as out-of-plane ones. The latter fact is at the origin of a complicated spatial distribution of electron-hole puddles which has no evident correlation with the out-of-plane topographic corrugations. In the range of parameters we have explored, exchange and correlation contributions to the Kohn-Sham potential seem to play a minor role." @default.
- W1966303445 created "2016-06-24" @default.
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- W1966303445 date "2010-03-26" @default.
- W1966303445 modified "2023-10-18" @default.
- W1966303445 title "Electron density distribution and screening in rippled graphene sheets" @default.
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- W1966303445 doi "https://doi.org/10.1103/physrevb.81.125437" @default.
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