Skip to main content
Journal cover image

Interfaces within graphene nanoribbons

Publication ,  Journal Article
Wurm, J; Wimmer, M; Adagideli, I; Richter, K; Baranger, HU
Published in: New Journal of Physics
September 30, 2009

We study the conductance through two types of graphene nanostructures: nanoribbon junctions in which the width changes from wide to narrow, and curved nanoribbons. In the wide-narrow structures, substantial reflection occurs from the wide-narrow interface, in contrast to the behavior of the much studied electron gas waveguides. In the curved nanoribbons, the conductance is very sensitive to details such as whether regions of a semiconducting armchair nanoribbon are included in the curved structure-such regions strongly suppress the conductance. Surprisingly, this suppression is not due to the band gap of the semiconducting nanoribbon, but is linked to the valley degree of freedom. Although we study these effects in the simplest contexts, they can be expected to occur for more complicated structures, and we show results for rings as well. We conclude that experience from electron gas waveguides does not carry over to graphene nanostructures. The interior interfaces causing extra scattering result from the extra effective degrees of freedom of the graphene structure, namely the valley and sublattice pseudospins. © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft.

Duke Scholars

Published In

New Journal of Physics

DOI

ISSN

1367-2630

Publication Date

September 30, 2009

Volume

11

Related Subject Headings

  • Fluids & Plasmas
  • 51 Physical sciences
  • 02 Physical Sciences
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Wurm, J., Wimmer, M., Adagideli, I., Richter, K., & Baranger, H. U. (2009). Interfaces within graphene nanoribbons. New Journal of Physics, 11. https://doi.org/10.1088/1367-2630/11/9/095022
Wurm, J., M. Wimmer, I. Adagideli, K. Richter, and H. U. Baranger. “Interfaces within graphene nanoribbons.” New Journal of Physics 11 (September 30, 2009). https://doi.org/10.1088/1367-2630/11/9/095022.
Wurm J, Wimmer M, Adagideli I, Richter K, Baranger HU. Interfaces within graphene nanoribbons. New Journal of Physics. 2009 Sep 30;11.
Wurm, J., et al. “Interfaces within graphene nanoribbons.” New Journal of Physics, vol. 11, Sept. 2009. Scopus, doi:10.1088/1367-2630/11/9/095022.
Wurm J, Wimmer M, Adagideli I, Richter K, Baranger HU. Interfaces within graphene nanoribbons. New Journal of Physics. 2009 Sep 30;11.
Journal cover image

Published In

New Journal of Physics

DOI

ISSN

1367-2630

Publication Date

September 30, 2009

Volume

11

Related Subject Headings

  • Fluids & Plasmas
  • 51 Physical sciences
  • 02 Physical Sciences