Electron flow in circular n-p junctions of bilayer graphene
Megjelenés dátuma: 2009
MTMT: 1385866
WoS ID: 000269638900088
Scopus ID: 70349146682
Absztrakt:
We present a theoretical study of electron wave functions in
ballistic circular n-p junctions of bilayer graphene. Similarly
to the case of a circular n-p junction of monolayer graphene, we
find that (i) the wave functions form caustics inside the
circular region and (ii) the shape of these caustics are well
described by a geometrical optics model using the concept of a
negative refractive index. In contrast to the monolayer case, we
show that the strong focusing effect is absent in the bilayer.
We explain these findings in terms of the angular dependence of
Klein tunneling at a planar n-p junction.
A tételhez tartozó fájlok
Név: Electron Flow in Circular n-p Junctions of Bilayer Graphene.pdf
Méret: 292.6Kb
Formátum: PDF