Publications in Scientific Journals:
F. Libisch, C Stampfer, J. Burgdörfer:
"Graphene quantum dots: beyond a Dirac billiard";
Physical Review B,
79
(2009),
115423
- 115429.
English abstract:
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.
Keywords:
graphene, quantum dots, Dirac billiards
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
http://dx.doi.org/10.1103/PhysRevB.79.115423
Created from the Publication Database of the Vienna University of Technology.