Zero-energy pinning from interactions in Majorana nanowires

Condensed-matter physics: zero-energy pinning of Majoranas Majorana zero modes are quasiparticle excitations which are charge neutral at the boundaries of topological superconductors. Their practical generation in semiconducting nanowires of realistic length often faces Majorana overlaps leading to...

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Autores principales:	Fernando Domínguez, Jorge Cayao, Pablo San-Jose, Ramón Aguado, Alfredo Levy Yeyati, Elsa Prada
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
Acceso en línea:	https://doaj.org/article/89adf7a657b44779aec0a67df6f3ea70
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spelling	oai:doaj.org-article:89adf7a657b44779aec0a67df6f3ea702021-12-02T14:22:33ZZero-energy pinning from interactions in Majorana nanowires10.1038/s41535-017-0012-02397-4648https://doaj.org/article/89adf7a657b44779aec0a67df6f3ea702017-03-01T00:00:00Zhttps://doi.org/10.1038/s41535-017-0012-0https://doaj.org/toc/2397-4648Condensed-matter physics: zero-energy pinning of Majoranas Majorana zero modes are quasiparticle excitations which are charge neutral at the boundaries of topological superconductors. Their practical generation in semiconducting nanowires of realistic length often faces Majorana overlaps leading to charged states that are no longer topologically protected against electrostatic interactions with the environment. Now, a team of researchers in Spain from Autonomous University of Madrid and Institute of Materials Science of Madrid, CSIC, demonstrates that the electrostatic environment may be engineered so that interactions fully suppress Majorana hybridization around parity crossings. That is, zero-energy crossings are stabilized into regions in parameter space where Majoranas become pinned to zero energy. The zero splitting of non-overlapping Majoranas, commonly associated to topological protection and to applications in topological quantum computation, can occur in spite of the Majorana overlap in nanowires of finite length. The generic zero-energy pinning mechanism could be extended to other contexts such as parity crossings of Shiba states in non-topological superconductors.Fernando DomínguezJorge CayaoPablo San-JoseRamón AguadoAlfredo Levy YeyatiElsa PradaNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 2, Iss 1, Pp 1-6 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Atomic physics. Constitution and properties of matter QC170-197 Fernando Domínguez Jorge Cayao Pablo San-Jose Ramón Aguado Alfredo Levy Yeyati Elsa Prada Zero-energy pinning from interactions in Majorana nanowires
description	Condensed-matter physics: zero-energy pinning of Majoranas Majorana zero modes are quasiparticle excitations which are charge neutral at the boundaries of topological superconductors. Their practical generation in semiconducting nanowires of realistic length often faces Majorana overlaps leading to charged states that are no longer topologically protected against electrostatic interactions with the environment. Now, a team of researchers in Spain from Autonomous University of Madrid and Institute of Materials Science of Madrid, CSIC, demonstrates that the electrostatic environment may be engineered so that interactions fully suppress Majorana hybridization around parity crossings. That is, zero-energy crossings are stabilized into regions in parameter space where Majoranas become pinned to zero energy. The zero splitting of non-overlapping Majoranas, commonly associated to topological protection and to applications in topological quantum computation, can occur in spite of the Majorana overlap in nanowires of finite length. The generic zero-energy pinning mechanism could be extended to other contexts such as parity crossings of Shiba states in non-topological superconductors.
format	article
author	Fernando Domínguez Jorge Cayao Pablo San-Jose Ramón Aguado Alfredo Levy Yeyati Elsa Prada
author_facet	Fernando Domínguez Jorge Cayao Pablo San-Jose Ramón Aguado Alfredo Levy Yeyati Elsa Prada
author_sort	Fernando Domínguez
title	Zero-energy pinning from interactions in Majorana nanowires
title_short	Zero-energy pinning from interactions in Majorana nanowires
title_full	Zero-energy pinning from interactions in Majorana nanowires
title_fullStr	Zero-energy pinning from interactions in Majorana nanowires
title_full_unstemmed	Zero-energy pinning from interactions in Majorana nanowires
title_sort	zero-energy pinning from interactions in majorana nanowires
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/89adf7a657b44779aec0a67df6f3ea70
work_keys_str_mv	AT fernandodominguez zeroenergypinningfrominteractionsinmajoranananowires AT jorgecayao zeroenergypinningfrominteractionsinmajoranananowires AT pablosanjose zeroenergypinningfrominteractionsinmajoranananowires AT ramonaguado zeroenergypinningfrominteractionsinmajoranananowires AT alfredolevyyeyati zeroenergypinningfrominteractionsinmajoranananowires AT elsaprada zeroenergypinningfrominteractionsinmajoranananowires
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Zero-energy pinning from interactions in Majorana nanowires

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