Interference Single Electron Transistors Based on Quantum Dot Molecules - Quantum Dot Molecules - page 252

quantum dots, a highly desirable property for spintronics [ 23 - 25 ] and spin-qubit
applications [ 26 - 30 ]. Similar blocking effects have been found also in multiple
quantum dot systems in dc [ 31 ]andac[ 32 ] magnetic fields.
Finally, we provide a detailed discussion of the impact of the reduced symmetry
due to linking groups between the molecule and the leads or to an electrostatic
potential drop over the molecule. We classify different transport regimes and set
up the limits within which the discussed transport features are robust against
perturbations. We identify in the quasi-degeneracy of the many-body states the
necessary condition for interference effects.
Acknowledgements We would like to thank Dr. Georg Begemann and Dana Darau for their
important contribution to the development of the research presented in this chapter. We also
acknowledge the German Research Foundation (DFG) for the financial support through the
research programs SPP 1243, SFB 689 and GRK 1570.
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