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Noisy defects in the high-T(c) superconductor Bi(2)Sr(2)CaCu(2)O(8+x)

Dopants and impurities are crucial in shaping the ground state of host materials: semiconducting technology is based on their ability to donate or trap electrons, and they can even be used to transform insulators into high temperature superconductors. Due to limited time resolution, most atomic-scal...

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Autores principales: Massee, F., Huang, Y. K., Golden, M. S., Aprili, M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6358600/
https://www.ncbi.nlm.nih.gov/pubmed/30710086
http://dx.doi.org/10.1038/s41467-019-08518-1
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author Massee, F.
Huang, Y. K.
Golden, M. S.
Aprili, M.
author_facet Massee, F.
Huang, Y. K.
Golden, M. S.
Aprili, M.
author_sort Massee, F.
collection PubMed
description Dopants and impurities are crucial in shaping the ground state of host materials: semiconducting technology is based on their ability to donate or trap electrons, and they can even be used to transform insulators into high temperature superconductors. Due to limited time resolution, most atomic-scale studies of the latter materials focussed on the effect of dopants on the electronic properties averaged over time. Here, by using atomic-scale current-noise measurements in optimally doped Bi(2)Sr(2)CaCu(2)O(8+x), we visualize sub-nanometre sized objects where the tunnelling current-noise is enhanced by at least an order of magnitude. We show that these objects are previously undetected oxygen dopants whose ionization and local environment leads to unconventional charge dynamics resulting in correlated tunnelling events. The ionization of these dopants opens up new routes to dynamically control doping at the atomic scale, enabling the direct visualization of local charging on e.g. high-T(c) superconductivity.
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spelling pubmed-63586002019-02-04 Noisy defects in the high-T(c) superconductor Bi(2)Sr(2)CaCu(2)O(8+x) Massee, F. Huang, Y. K. Golden, M. S. Aprili, M. Nat Commun Article Dopants and impurities are crucial in shaping the ground state of host materials: semiconducting technology is based on their ability to donate or trap electrons, and they can even be used to transform insulators into high temperature superconductors. Due to limited time resolution, most atomic-scale studies of the latter materials focussed on the effect of dopants on the electronic properties averaged over time. Here, by using atomic-scale current-noise measurements in optimally doped Bi(2)Sr(2)CaCu(2)O(8+x), we visualize sub-nanometre sized objects where the tunnelling current-noise is enhanced by at least an order of magnitude. We show that these objects are previously undetected oxygen dopants whose ionization and local environment leads to unconventional charge dynamics resulting in correlated tunnelling events. The ionization of these dopants opens up new routes to dynamically control doping at the atomic scale, enabling the direct visualization of local charging on e.g. high-T(c) superconductivity. Nature Publishing Group UK 2019-02-01 /pmc/articles/PMC6358600/ /pubmed/30710086 http://dx.doi.org/10.1038/s41467-019-08518-1 Text en © The Author(s) 2019 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
Massee, F.
Huang, Y. K.
Golden, M. S.
Aprili, M.
Noisy defects in the high-T(c) superconductor Bi(2)Sr(2)CaCu(2)O(8+x)
title Noisy defects in the high-T(c) superconductor Bi(2)Sr(2)CaCu(2)O(8+x)
title_full Noisy defects in the high-T(c) superconductor Bi(2)Sr(2)CaCu(2)O(8+x)
title_fullStr Noisy defects in the high-T(c) superconductor Bi(2)Sr(2)CaCu(2)O(8+x)
title_full_unstemmed Noisy defects in the high-T(c) superconductor Bi(2)Sr(2)CaCu(2)O(8+x)
title_short Noisy defects in the high-T(c) superconductor Bi(2)Sr(2)CaCu(2)O(8+x)
title_sort noisy defects in the high-t(c) superconductor bi(2)sr(2)cacu(2)o(8+x)
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6358600/
https://www.ncbi.nlm.nih.gov/pubmed/30710086
http://dx.doi.org/10.1038/s41467-019-08518-1
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