1. Charged defects in graphene and the ionicity of hexagonal boron nitride in direct images
- Author
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Meyer, Jannik C., Kurasch, Simon, Park, Hye Jin, Skakalova, Viera, Künzel, Daniela, Groß, Axel, Chuvilin, Andrey, Algara-Siller, Gerardo, Roth, Siegmar, Iwasaki, Takayuki, Starke, Ulrich, Smet, Jürgen, and Kaiser, Ute
- Subjects
Condensed Matter - Materials Science - Abstract
We report on the detection and charge distribution analysis for nitrogen substitutional dopants in single layer graphene membranes by aberration-corrected high-resolution transmission electron microscopy (HRTEM). Further, we show that the ionicity of single-layer hexagonal boron nitride can be confirmed from direct images. For the first time, we demonstrate by a combination of HRTEM experiments and first-principles electronic structure calculations that adjustments to the atomic potentials due to chemical bonding can be discerned in HRTEM images. Our experiments open a way to discern electronic configurations in point defects or other non-periodic arrangements or nanoscale objects that can not be analyzed in an electron or x-ray diffraction experiment., Comment: Article and supplementary information, v2 one more figure
- Published
- 2010