Biomedical Engineering Reference
In-Depth Information
Fig. 7.8
Left panel
—Current through the benzene I-SET in the para configuration calculated at
bias and gate voltage conditions indicated by the
dashed line
of Fig.
7.4
. No interference effects
are visible.
Right panels
—Transition probabilities between the 6-particle and the symmetric and
antisymmetric 7-particle ground states. From [
20
]
Fig. 7.9
Schematic
representation of a triple dot
interference single electron
transistor (I-SET). From [
22
]
its capability of combining incoherent transport characteristics and signatures of
molecular coherence. The triple dot I-SET that we consider here (Fig.
7.9
)isthe
simplest structure with symmetry protected orbital degeneracy exhibiting interfer-
ence blockade. Despite its relative simplicity this system displays different kinds of
current blocking and it represents for this reason a suitable playground for the ideas
presented in Sect.
7.3
. In particular we will concentrate on the blockade that involves
an
excited
triplet state: a regime which is not achievable in the benzene I-SET.
