Biomedical Engineering Reference
In-Depth Information
Fig. 7.16
Spin control. Panel ( a )—Current through the benzene I-SET vs bias and polarization at
the 6
7 electrons transition. Panel ( b )—Population of the majority spin 7-particle state. The two
zero current lines at high bias correspond to the maximum or minimum population of the 7-particle
majority spin state and thus identify the spin state of the trapped electron on the molecule. Panels
( c )and( d )—Schematic representation of the spin selective blocking corresponding to the dashed
( c )and dotted ( d ) lines of the panels A and B. From [ 21 ]
(quantum dot) closest to the drain; this state is thus also an eigenstate of the
projection of the angular momentum in the direction of the drain lead. 4
At
positive (negative) bias voltages we call this state the R
(
L
)
-antisymmetric state
.
(ii) The complete interference blocking is only achieved when
| ψ R ( L ) , a
[ ρ block ,
H eff ]=
0.
4 The corresponding eigenvalue depends on the symmetry of the atomic (quantum dot) wave
function with respect to the molecular (artificial molecule) plane: h or 0 for symmetric or
antisymmetric wave functions, respectively.
Search WWH ::




Custom Search