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Paper detail

Etched graphene quantum dots on hexagonal boron nitride

We report on the fabrication and characterization of etched graphene quantum dots (QDs) on hexagonal boron nitride (hBN) and SiO2 with different island diameters. We perform a statistical analysis of Coulomb peak spacings over a wide energy range. For graphene QDs on hBN, the standard deviation of the normalized peak spacing distribution decreases with increasing QD diameter, whereas for QDs on SiO2 no diameter dependency is observed. In addition, QDs on hBN are more stable under the influence of perpendicular magnetic fields up to 9T. Both results indicate a substantially reduced substrate induced disorder potential in graphene QDs on hBN.

preprint2013arXivOpen access
S. EngelsA. EppingC. VolkS. KorteB. VoigtländerK. WatanabeT. TaniguchiS. TrellenkampC. Stampfer
cond-mat.mes-hall
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S. EngelsA. EppingC. VolkS. KorteB. VoigtländerK. WatanabeT. TaniguchiS. TrellenkampC. Stampfer

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