期刊
NEW JOURNAL OF PHYSICS
卷 18, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/18/3/033013
关键词
Majorana zero modes; semiconducting nanowires; electrostatics; semiconductor-superconductor heterostructures
资金
- Foundation for Fundamental Research on Matter (FOM)
- Microsoft Corporation Station Q
- Netherlands Organization for Scientific Research (NWO/OCW) as part of Frontiers of Nanoscience program
- ERC [638760]
- European Research Council (ERC) [638760] Funding Source: European Research Council (ERC)
One of the promising platforms for creating Majorana bound states is a hybrid nanostructure consisting of a semiconducting nanowire covered by a superconductor. We analyze the previously disregarded role of electrostatic interaction in these devices. Our main result is that Coulomb interaction causes the chemical potential to respond to an applied magnetic field, while spin-orbit interaction and screening by the superconducting lead suppress this response. Consequently, the electrostatic environment influences two properties of Majorana devices: the shape of the topological phase boundary and the oscillations of the Majorana splitting energy. We demonstrate that both properties show a non-universal behavior, and depend on the details of the electrostatic environment. We show that when the wire only contains a single electron mode, the experimentally accessible inverse self-capacitance of this mode fully captures the interplay between electrostatics and Zeeman field. This offers a way to compare theoretical predictions with experiments.
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