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

Pientka, Falko and Kells, Graham and Romito, Alessandro and Brouwer, Piet W. and Von Oppen, Felix (2012) Enhanced zero-bias majorana peak in the differential tunneling conductance of disordered multisubband quantum-wire/superconductor junctions. Physical review letters, 109 (22). ISSN 0031-9007

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Abstract

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.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
139246
Deposited By:
Deposited On:
02 Dec 2019 10:45
Refereed?:
Yes
Published?:
Published
Last Modified:
12 Aug 2020 09:48