Multiterminal Josephson Effect

We report a probable observation of the dc Josephson effect in mesoscopic junctions of three and four superconductors. The devices are fabricated in a top-down fashion from a hybrid semiconductor-superconductor InAs/Al epitaxial heterostructure. In general, the critical current of an N-terminal junc...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Natalia Pankratova, Hanho Lee, Roman Kuzmin, Kaushini Wickramasinghe, William Mayer, Joseph Yuan, Maxim G. Vavilov, Javad Shabani, Vladimir E. Manucharyan
Formato:	article
Lenguaje:	EN
Publicado:	American Physical Society 2020
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/7f6f228d7fc1498c80ad7441fbf8dccb
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:7f6f228d7fc1498c80ad7441fbf8dccb
record_format	dspace
spelling	oai:doaj.org-article:7f6f228d7fc1498c80ad7441fbf8dccb2021-12-02T12:06:00ZMultiterminal Josephson Effect10.1103/PhysRevX.10.0310512160-3308https://doaj.org/article/7f6f228d7fc1498c80ad7441fbf8dccb2020-09-01T00:00:00Zhttp://doi.org/10.1103/PhysRevX.10.031051http://doi.org/10.1103/PhysRevX.10.031051https://doaj.org/toc/2160-3308We report a probable observation of the dc Josephson effect in mesoscopic junctions of three and four superconductors. The devices are fabricated in a top-down fashion from a hybrid semiconductor-superconductor InAs/Al epitaxial heterostructure. In general, the critical current of an N-terminal junction is an (N-1)-dimensional hypersurface in the space of bias currents, which can be reduced to a set of critical current contours. The geometry of critical current contours exhibits nontrivial responses to electrical gating, magnetic field, and phase bias, and it can be reproduced by the scattering formulation of the Josephson effect generalized to the case of N>2. Besides establishing solid ground beneath a host of recent theory proposals, our experiment accomplishes an important step toward creating trijunctions of topological superconductors, essential for braiding operations.Natalia PankratovaHanho LeeRoman KuzminKaushini WickramasingheWilliam MayerJoseph YuanMaxim G. VavilovJavad ShabaniVladimir E. ManucharyanAmerican Physical SocietyarticlePhysicsQC1-999ENPhysical Review X, Vol 10, Iss 3, p 031051 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Natalia Pankratova Hanho Lee Roman Kuzmin Kaushini Wickramasinghe William Mayer Joseph Yuan Maxim G. Vavilov Javad Shabani Vladimir E. Manucharyan Multiterminal Josephson Effect
description	We report a probable observation of the dc Josephson effect in mesoscopic junctions of three and four superconductors. The devices are fabricated in a top-down fashion from a hybrid semiconductor-superconductor InAs/Al epitaxial heterostructure. In general, the critical current of an N-terminal junction is an (N-1)-dimensional hypersurface in the space of bias currents, which can be reduced to a set of critical current contours. The geometry of critical current contours exhibits nontrivial responses to electrical gating, magnetic field, and phase bias, and it can be reproduced by the scattering formulation of the Josephson effect generalized to the case of N>2. Besides establishing solid ground beneath a host of recent theory proposals, our experiment accomplishes an important step toward creating trijunctions of topological superconductors, essential for braiding operations.
format	article
author	Natalia Pankratova Hanho Lee Roman Kuzmin Kaushini Wickramasinghe William Mayer Joseph Yuan Maxim G. Vavilov Javad Shabani Vladimir E. Manucharyan
author_facet	Natalia Pankratova Hanho Lee Roman Kuzmin Kaushini Wickramasinghe William Mayer Joseph Yuan Maxim G. Vavilov Javad Shabani Vladimir E. Manucharyan
author_sort	Natalia Pankratova
title	Multiterminal Josephson Effect
title_short	Multiterminal Josephson Effect
title_full	Multiterminal Josephson Effect
title_fullStr	Multiterminal Josephson Effect
title_full_unstemmed	Multiterminal Josephson Effect
title_sort	multiterminal josephson effect
publisher	American Physical Society
publishDate	2020
url	https://doaj.org/article/7f6f228d7fc1498c80ad7441fbf8dccb
work_keys_str_mv	AT nataliapankratova multiterminaljosephsoneffect AT hanholee multiterminaljosephsoneffect AT romankuzmin multiterminaljosephsoneffect AT kaushiniwickramasinghe multiterminaljosephsoneffect AT williammayer multiterminaljosephsoneffect AT josephyuan multiterminaljosephsoneffect AT maximgvavilov multiterminaljosephsoneffect AT javadshabani multiterminaljosephsoneffect AT vladimiremanucharyan multiterminaljosephsoneffect
_version_	1718394698951819264

Multiterminal Josephson Effect

Ejemplares similares