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Unified numerical approach to topological semiconductor-superconductor heterostructures


Winkler, Georg W; Antipov, Andrey E; van Heck, Bernard; Soluyanov, Alexey A; Glazman, Leonid I; Wimmer, Michael; Lutchyn, Roman M (2019). Unified numerical approach to topological semiconductor-superconductor heterostructures. Physical review. B, 99:245408.

Abstract

We develop a unified numerical approach for modeling semiconductor-superconductor heterostructures. All the key physical ingredients of these systems—orbital effect of magnetic field, superconducting proximity effect, and electrostatic environment—are taken into account on equal footing in a realistic device geometry. As a model system, we consider indium arsenide (InAs) nanowires with an epitaxial aluminum (Al) shell, which is one of the most promising platforms for Majorana zero modes. We demonstrate qualitative and quantitative agreement of the obtained results with the existing experimental data. Finally, we characterize the topological superconducting phase emerging in a finite magnetic field and calculate the corresponding topological phase diagram.

Abstract

We develop a unified numerical approach for modeling semiconductor-superconductor heterostructures. All the key physical ingredients of these systems—orbital effect of magnetic field, superconducting proximity effect, and electrostatic environment—are taken into account on equal footing in a realistic device geometry. As a model system, we consider indium arsenide (InAs) nanowires with an epitaxial aluminum (Al) shell, which is one of the most promising platforms for Majorana zero modes. We demonstrate qualitative and quantitative agreement of the obtained results with the existing experimental data. Finally, we characterize the topological superconducting phase emerging in a finite magnetic field and calculate the corresponding topological phase diagram.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:13 June 2019
Deposited On:03 Feb 2020 15:41
Last Modified:03 Feb 2020 15:50
Publisher:American Physical Society
ISSN:2469-9950
OA Status:Green
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1103/physrevb.99.245408

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