Theorie Kolloquium | December 16, 16:30
Quantum interference effects in interacting quantum dots
We consider multiple quantum dots or molecular junctions in the single-electron tunneling regime which, due to a high degree of spatial
symmetry, have a degenerate many-body spectrum. As a consequence, interference phenomena which cause a
current blocking can occur at specific values of the bias and gate voltage. We present here
necessary and sufficient conditions for interference blockade also in the presence of spin-polarized
leads. As an example we analyze a benzene single-electron transistor. For a setup with parallel
polarized leads, we show how to exploit the current blocking to selectively prepare the system in a defined spin state
without application of any external magnetic field.
University of Regensburg
Seminarraum Theoretische Physik
Contact: not specified