From hidden metal-insulator transition to Planckian-like dissipation by tuning the oxygen content in a nickelate

Abstract Heavily oxygen-deficient NdNiO3 (NNO) films, which are insulating due to electron localization, contain pristine regions that undergo a hidden metal-insulator transition. Increasing oxygen content increases the connectivity of the metallic regions and the metal-insulator transition is first...

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Autores principales:	Qikai Guo, Beatriz Noheda
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
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/d18cc3145b2f4fd1a777c722de6f37d3
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spelling	oai:doaj.org-article:d18cc3145b2f4fd1a777c722de6f37d32021-12-02T19:06:43ZFrom hidden metal-insulator transition to Planckian-like dissipation by tuning the oxygen content in a nickelate10.1038/s41535-021-00374-x2397-4648https://doaj.org/article/d18cc3145b2f4fd1a777c722de6f37d32021-08-01T00:00:00Zhttps://doi.org/10.1038/s41535-021-00374-xhttps://doaj.org/toc/2397-4648Abstract Heavily oxygen-deficient NdNiO3 (NNO) films, which are insulating due to electron localization, contain pristine regions that undergo a hidden metal-insulator transition. Increasing oxygen content increases the connectivity of the metallic regions and the metal-insulator transition is first revealed, upon reaching the percolation threshold, by the presence of hysteresis. Only upon further oxygenation is the global metallic state (with a change in the resistivity slope) eventually achieved. It is shown that sufficient oxygenation leads to linear temperature dependence of resistivity in the metallic state, with a scattering rate directly proportional to temperature. Despite the known difficulties to establish the proportionality constant, the experiments are consistent with a relationship 1/τ = α k B T/ℏ, with α not far from unity. These results could provide experimental support for recent theoretical predictions of disorder in a two-fluid model as a possible origin of Planckian dissipation.Qikai GuoBeatriz NohedaNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 6, Iss 1, Pp 1-7 (2021)
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 Qikai Guo Beatriz Noheda From hidden metal-insulator transition to Planckian-like dissipation by tuning the oxygen content in a nickelate
description	Abstract Heavily oxygen-deficient NdNiO3 (NNO) films, which are insulating due to electron localization, contain pristine regions that undergo a hidden metal-insulator transition. Increasing oxygen content increases the connectivity of the metallic regions and the metal-insulator transition is first revealed, upon reaching the percolation threshold, by the presence of hysteresis. Only upon further oxygenation is the global metallic state (with a change in the resistivity slope) eventually achieved. It is shown that sufficient oxygenation leads to linear temperature dependence of resistivity in the metallic state, with a scattering rate directly proportional to temperature. Despite the known difficulties to establish the proportionality constant, the experiments are consistent with a relationship 1/τ = α k B T/ℏ, with α not far from unity. These results could provide experimental support for recent theoretical predictions of disorder in a two-fluid model as a possible origin of Planckian dissipation.
format	article
author	Qikai Guo Beatriz Noheda
author_facet	Qikai Guo Beatriz Noheda
author_sort	Qikai Guo
title	From hidden metal-insulator transition to Planckian-like dissipation by tuning the oxygen content in a nickelate
title_short	From hidden metal-insulator transition to Planckian-like dissipation by tuning the oxygen content in a nickelate
title_full	From hidden metal-insulator transition to Planckian-like dissipation by tuning the oxygen content in a nickelate
title_fullStr	From hidden metal-insulator transition to Planckian-like dissipation by tuning the oxygen content in a nickelate
title_full_unstemmed	From hidden metal-insulator transition to Planckian-like dissipation by tuning the oxygen content in a nickelate
title_sort	from hidden metal-insulator transition to planckian-like dissipation by tuning the oxygen content in a nickelate
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/d18cc3145b2f4fd1a777c722de6f37d3
work_keys_str_mv	AT qikaiguo fromhiddenmetalinsulatortransitiontoplanckianlikedissipationbytuningtheoxygencontentinanickelate AT beatriznoheda fromhiddenmetalinsulatortransitiontoplanckianlikedissipationbytuningtheoxygencontentinanickelate
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From hidden metal-insulator transition to Planckian-like dissipation by tuning the oxygen content in a nickelate

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