Bound states in the continuum in graphene quantum dot structures
Departamento de Física, Universidad Técnica Federico Santa María - Casilla 110 V, Valparaíso, Chile
2 Instituto de Física, Pontificia Universidad Católica de Valparaíso - Casilla 4059, Valparaíso, Chile
3 Departamento de Física, Universidad Católica del Norte - Casilla 1280, Antofagasta, Chile
Accepted: 9 September 2010
The existence of bound states in the continuum was predicted at the dawn of quantum mechanics by von Neumann and Wigner. In this work we discuss the mechanism of formation of these exotic states and the feasibility to observe them experimentally in symmetrical heterostructures composed by segments of graphene ribbons with different widths forming a graphene quantum dot. We identify the existence of bound states in the continuum in these graphene quantum dot systems by means of local density of states and electronic conductance calculations.
PACS: 61.46.-w – Structure of nanoscale materials / 73.22.-f – Electronic structure of nanoscale materials and related systems / 73.63.-b – Electronic transport in nanoscale materials and structures
© EPLA, 2010