Ultra-high critical current densities of superconducting YBa2Cu3O7-δ thin films in the overdoped state

Abstract The functional properties of cuprates are strongly determined by the doping state and carrier density. We present an oxygen doping study of YBa2Cu3O7-δ (YBCO) thin films from underdoped to overdoped state, correlating the measured charge carrier density, $${n}_{\mathrm{H}}$$ n H , the hole...

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Autores principales:	A. Stangl, A. Palau, G. Deutscher, X. Obradors, T. Puig
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6bedf9e33c3e41e6a7b0a419f023497a
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spelling	oai:doaj.org-article:6bedf9e33c3e41e6a7b0a419f023497a2021-12-02T18:03:47ZUltra-high critical current densities of superconducting YBa2Cu3O7-δ thin films in the overdoped state10.1038/s41598-021-87639-42045-2322https://doaj.org/article/6bedf9e33c3e41e6a7b0a419f023497a2021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87639-4https://doaj.org/toc/2045-2322Abstract The functional properties of cuprates are strongly determined by the doping state and carrier density. We present an oxygen doping study of YBa2Cu3O7-δ (YBCO) thin films from underdoped to overdoped state, correlating the measured charge carrier density, $${n}_{\mathrm{H}}$$ n H , the hole doping, p, and the critical current density, $${J}_{c}$$ J c . Our results show experimental demonstration of strong increase of $${J}_{c}$$ J c with $${n}_{\mathrm{H}}$$ n H , up to Quantum Critical Point (QCP), due to an increase of the superconducting condensation energy. The ultra-high $${J}_{c}$$ J c achieved, 90 MA cm−2 at 5 K corresponds to about a fifth of the depairing current, i.e. a value among the highest ever reported in YBCO films. The overdoped regime is confirmed by a sudden increase of $${n}_{\mathrm{H}}$$ n H , associated to the reconstruction of the Fermi-surface at the QCP. Overdoping YBCO opens a promising route to extend the current carrying capabilities of rare-earth barium copper oxide (REBCO) coated conductors for applications.A. StanglA. PalauG. DeutscherX. ObradorsT. PuigNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q A. Stangl A. Palau G. Deutscher X. Obradors T. Puig Ultra-high critical current densities of superconducting YBa2Cu3O7-δ thin films in the overdoped state
description	Abstract The functional properties of cuprates are strongly determined by the doping state and carrier density. We present an oxygen doping study of YBa2Cu3O7-δ (YBCO) thin films from underdoped to overdoped state, correlating the measured charge carrier density, $${n}_{\mathrm{H}}$$ n H , the hole doping, p, and the critical current density, $${J}_{c}$$ J c . Our results show experimental demonstration of strong increase of $${J}_{c}$$ J c with $${n}_{\mathrm{H}}$$ n H , up to Quantum Critical Point (QCP), due to an increase of the superconducting condensation energy. The ultra-high $${J}_{c}$$ J c achieved, 90 MA cm−2 at 5 K corresponds to about a fifth of the depairing current, i.e. a value among the highest ever reported in YBCO films. The overdoped regime is confirmed by a sudden increase of $${n}_{\mathrm{H}}$$ n H , associated to the reconstruction of the Fermi-surface at the QCP. Overdoping YBCO opens a promising route to extend the current carrying capabilities of rare-earth barium copper oxide (REBCO) coated conductors for applications.
format	article
author	A. Stangl A. Palau G. Deutscher X. Obradors T. Puig
author_facet	A. Stangl A. Palau G. Deutscher X. Obradors T. Puig
author_sort	A. Stangl
title	Ultra-high critical current densities of superconducting YBa2Cu3O7-δ thin films in the overdoped state
title_short	Ultra-high critical current densities of superconducting YBa2Cu3O7-δ thin films in the overdoped state
title_full	Ultra-high critical current densities of superconducting YBa2Cu3O7-δ thin films in the overdoped state
title_fullStr	Ultra-high critical current densities of superconducting YBa2Cu3O7-δ thin films in the overdoped state
title_full_unstemmed	Ultra-high critical current densities of superconducting YBa2Cu3O7-δ thin films in the overdoped state
title_sort	ultra-high critical current densities of superconducting yba2cu3o7-δ thin films in the overdoped state
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6bedf9e33c3e41e6a7b0a419f023497a
work_keys_str_mv	AT astangl ultrahighcriticalcurrentdensitiesofsuperconductingyba2cu3o7dthinfilmsintheoverdopedstate AT apalau ultrahighcriticalcurrentdensitiesofsuperconductingyba2cu3o7dthinfilmsintheoverdopedstate AT gdeutscher ultrahighcriticalcurrentdensitiesofsuperconductingyba2cu3o7dthinfilmsintheoverdopedstate AT xobradors ultrahighcriticalcurrentdensitiesofsuperconductingyba2cu3o7dthinfilmsintheoverdopedstate AT tpuig ultrahighcriticalcurrentdensitiesofsuperconductingyba2cu3o7dthinfilmsintheoverdopedstate
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Ultra-high critical current densities of superconducting YBa2Cu3O7-δ thin films in the overdoped state

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