Andreev Reflection in a T-Shaped Double-Quantum-Dot Structure Induced by Maj orana Bound States

摘要

The Andreev reflection in a T-shaped double-quantum-dot structure induced by Majorana bound states is theoretically investigated. It is found that due to the Fano effect, the Andreev conductance spectrum presents a well-defined insulating band in the low-bias region. By discussing the influences of quantum dot levels, interdot coupling, and the coupling between the quantum dot and the Majorana bound state, the properties of the insulating'band are analyzed in detail. We believe that all the results can help the researchers to understand the nontrivial role of the Majorana bound states in manipulating the Andreev reflection.