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Johansson LI, Armiento R, Avila J, et al. Multiple π-bands and Bernal stacking of multilayer graphene on C-face SiC, revealed by nano-Angle Resolved Photoemission. Sci Rep. 2014;4:4157doi: 10.1038/srep04157.
Johansson, L. I., Armiento, R., Avila, J., Xia, C., Lorcy, S., Abrikosov, I. A., Asensio, M. C., & Virojanadara, C. (2014). Multiple π-bands and Bernal stacking of multilayer graphene on C-face SiC, revealed by nano-Angle Resolved Photoemission. Scientific reports, 44157. https://doi.org/10.1038/srep04157
Johansson, Leif I, et al. "Multiple π-bands and Bernal stacking of multilayer graphene on C-face SiC, revealed by nano-Angle Resolved Photoemission." Scientific reports vol. 4 (2014): 4157. doi: https://doi.org/10.1038/srep04157
Johansson LI, Armiento R, Avila J, Xia C, Lorcy S, Abrikosov IA, Asensio MC, Virojanadara C. Multiple π-bands and Bernal stacking of multilayer graphene on C-face SiC, revealed by nano-Angle Resolved Photoemission. Sci Rep. 2014 Feb 24;4:4157. doi: 10.1038/srep04157. PMID: 24561727; PMCID: PMC3932481.
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Sci Rep. 2014 Feb 24;4:4157. doi: 10.1038/srep04157.

Multiple π-bands and Bernal stacking of multilayer graphene on C-face SiC, revealed by nano-Angle Resolved Photoemission.

Scientific reports

Leif I Johansson, Rickard Armiento, Jose Avila, Chao Xia, Stephan Lorcy, Igor A Abrikosov, Maria C Asensio, Chariya Virojanadara

Affiliations

  1. Department of Physics, Chemistry and Biology, Linköping University, SE-58183 Linköping, Sweden.
  2. Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin-BP 48, 9192 Gif sur Yvette Cedex, France.

PMID: 24561727 PMCID: PMC3932481 DOI: 10.1038/srep04157

Abstract

Only a single linearly dispersing π-band cone, characteristic of monolayer graphene, has so far been observed in Angle Resolved Photoemission (ARPES) experiments on multilayer graphene grown on C-face SiC. A rotational disorder that effectively decouples adjacent layers has been suggested to explain this. However, the coexistence of μm-sized grains of single and multilayer graphene with different azimuthal orientations and no rotational disorder within the grains was recently revealed for C-face graphene, but conventional ARPES still resolved only a single π-band. Here we report detailed nano-ARPES band mappings of individual graphene grains that unambiguously show that multilayer C-face graphene exhibits multiple π-bands. The band dispersions obtained close to the K-point moreover clearly indicate, when compared to theoretical band dispersion calculated in the framework of the density functional method, Bernal (AB) stacking within the grains. Thus, contrary to earlier claims, our findings imply a similar interaction between graphene layers on C-face and Si-face SiC.

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