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Creating Majorana modes from segmented Fermi surface

Majorana bound states provide a fertile ground for both investigation of fundamental phenomena as well as for applications in quantum computation. However, despite enormous experimental and theoretical efforts, the currently available Majorana platforms suffer from a multitude of issues that prevent...

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Detalles Bibliográficos
Autores principales: Papaj, Michał, Fu, Liang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7835351/
https://www.ncbi.nlm.nih.gov/pubmed/33495471
http://dx.doi.org/10.1038/s41467-020-20690-3
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author Papaj, Michał
Fu, Liang
author_facet Papaj, Michał
Fu, Liang
author_sort Papaj, Michał
collection PubMed
description Majorana bound states provide a fertile ground for both investigation of fundamental phenomena as well as for applications in quantum computation. However, despite enormous experimental and theoretical efforts, the currently available Majorana platforms suffer from a multitude of issues that prevent full realization of their potential. Therefore, improved Majorana systems are still highly sought after. Here we present a platform for creating Majorana bound states from 2D gapless superconducting state in spin-helical systems under the in-plane magnetic or Zeeman field. Topological 1D channels are formed by quantum confinement of quasiparticles via Andreev reflection from the surrounding fully gapped superconducting region. Our proposal can be realized using narrow strips of magnetic insulators on top of proximitized 3D topological insulators. This setup has key advantages that include: small required fields, no necessity of fine-tuning of chemical potential, removal of the low-energy detrimental states, and large attainable topological gap.
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spelling pubmed-78353512021-01-29 Creating Majorana modes from segmented Fermi surface Papaj, Michał Fu, Liang Nat Commun Article Majorana bound states provide a fertile ground for both investigation of fundamental phenomena as well as for applications in quantum computation. However, despite enormous experimental and theoretical efforts, the currently available Majorana platforms suffer from a multitude of issues that prevent full realization of their potential. Therefore, improved Majorana systems are still highly sought after. Here we present a platform for creating Majorana bound states from 2D gapless superconducting state in spin-helical systems under the in-plane magnetic or Zeeman field. Topological 1D channels are formed by quantum confinement of quasiparticles via Andreev reflection from the surrounding fully gapped superconducting region. Our proposal can be realized using narrow strips of magnetic insulators on top of proximitized 3D topological insulators. This setup has key advantages that include: small required fields, no necessity of fine-tuning of chemical potential, removal of the low-energy detrimental states, and large attainable topological gap. Nature Publishing Group UK 2021-01-25 /pmc/articles/PMC7835351/ /pubmed/33495471 http://dx.doi.org/10.1038/s41467-020-20690-3 Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Papaj, Michał
Fu, Liang
Creating Majorana modes from segmented Fermi surface
title Creating Majorana modes from segmented Fermi surface
title_full Creating Majorana modes from segmented Fermi surface
title_fullStr Creating Majorana modes from segmented Fermi surface
title_full_unstemmed Creating Majorana modes from segmented Fermi surface
title_short Creating Majorana modes from segmented Fermi surface
title_sort creating majorana modes from segmented fermi surface
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7835351/
https://www.ncbi.nlm.nih.gov/pubmed/33495471
http://dx.doi.org/10.1038/s41467-020-20690-3
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