Zeitschriftenartikel:
F. Libisch, C Stampfer, J. Burgdörfer:
"Graphene quantum dots: beyond a Dirac billiard";
Physical Review B,
79
(2009),
S. 115423
- 115429.
Kurzfassung englisch:
We present realistic simulations of quantum confinement effects in phase-coherent graphene quantum dots with linear dimensions of 10-40nm. We determine wave functions and energy-level statistics in the presence of disorder resulting from edge roughness, charge impurities, or short-ranged scatterers. Marked deviatons from a simple Dirac billiard for massless fermions are found. We find a remarkably stable dependence of the nearest-neighbor level spacing on edge roughness suggesting that the roughness of fabricated devices can be possibly characterized by the distribution of measured Coulomb blockade peaks.
Schlagworte:
graphene, quantum dots, Dirac billiards
"Offizielle" elektronische Version der Publikation (entsprechend ihrem Digital Object Identifier - DOI)
http://dx.doi.org/10.1103/PhysRevB.79.115423
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.