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Enhanced zero-bias majorana peak in the differential tunneling conductance of disordered multisubband quantum-wire/superconductor junctions

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Article number227006
<mark>Journal publication date</mark>29/11/2012
<mark>Journal</mark>Physical review letters
Issue number22
Publication StatusPublished
<mark>Original language</mark>English


A recent experiment Mourik etal. on InSb quantum wires provides possible evidence for the realization of a topological superconducting phase and the formation of Majorana bound states. Motivated by this experiment, we consider the signature of Majorana bound states in the differential tunneling conductance of multisubband wires. We show that the weight of the Majorana-induced zero-bias peak is strongly enhanced by mixing of subbands, when disorder is added to the end of the quantum wire. We also consider how the topological phase transition is reflected in the gap structure of the current-voltage characteristic.