Electron-hole puddles in the absence of charged impurities

Details Electron-hole puddles in the absence of charged impurities Electron-hole puddles in the absence of charged impurities

2011-11-27

arxiv.org/abs/1111.6280v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 3 figures

Scientific paper

It is widely believed that carrier-density inhomogeneities ("electron-hole puddles") in single-layer graphene on a substrate like quartz are due to charged impurities located close to the graphene sheet. In this Letter we demonstrate by using a Kohn-Sham-Dirac density-functional scheme that corrugations in a real sample are sufficient to determine electron-hole puddles on length scales that are larger than the spatial resolution of state-of-the-art scanning tunneling microscopy.

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