Electron-hole puddles in the absence of charged impurities

Gibertini, Marco and Tomadin, Andrea and Guinea, Francisco and Katsnelson, M. I. and Polini, Marco (2012) Electron-hole puddles in the absence of charged impurities. Physical review B, 85 (20). ISSN 1098-0121

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It is widely believed that carrier-density inhomogeneities (“electron-hole puddles”) in single-layer graphene on a substrate such as quartz are due to charged impurities located close to the graphene sheet. Here 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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Journal Article
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Physical review B
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23 Nov 2018 09:08
Last Modified:
15 Sep 2023 00:49