Microscopic description of insulator-metal transition in high-pressure oxygen

Abstract Unusual metallic states involving breakdown of the standard Fermi-liquid picture of long-lived quasiparticles in well-defined band states emerge at low temperatures near correlation-driven Mott transitions. Prominent examples are ill-understood metallic states in d- and f-band compounds nea...

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Autores principales:	Luis Craco, Mukul S. Laad, Stefano Leoni
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b55c5188dcb341c29e7c45b40aa16259
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spelling	oai:doaj.org-article:b55c5188dcb341c29e7c45b40aa162592021-12-02T15:05:47ZMicroscopic description of insulator-metal transition in high-pressure oxygen10.1038/s41598-017-02730-z2045-2322https://doaj.org/article/b55c5188dcb341c29e7c45b40aa162592017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02730-zhttps://doaj.org/toc/2045-2322Abstract Unusual metallic states involving breakdown of the standard Fermi-liquid picture of long-lived quasiparticles in well-defined band states emerge at low temperatures near correlation-driven Mott transitions. Prominent examples are ill-understood metallic states in d- and f-band compounds near Mott-like transitions. Finding of superconductivity in solid O2 on the border of an insulator-metal transition at high pressures close to 96 GPa is thus truly remarkable. Neither the insulator-metal transition nor superconductivity are understood satisfactorily. Here, we undertake a first step in this direction by focussing on the pressure-driven insulator-metal transition using a combination of first-principles density-functional and many-body calculations. We report a striking result: the finding of an orbital-selective Mott transition in a pure p-band elemental system. We apply our theory to understand extant structural and transport data across the transition, and make a specific two-fluid prediction that is open to future test. Based thereupon, we propose a novel scenario where soft multiband modes built from microscopically coexisting itinerant and localized electronic states are natural candidates for the pairing glue in pressurized O2.Luis CracoMukul S. LaadStefano LeoniNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Luis Craco Mukul S. Laad Stefano Leoni Microscopic description of insulator-metal transition in high-pressure oxygen
description	Abstract Unusual metallic states involving breakdown of the standard Fermi-liquid picture of long-lived quasiparticles in well-defined band states emerge at low temperatures near correlation-driven Mott transitions. Prominent examples are ill-understood metallic states in d- and f-band compounds near Mott-like transitions. Finding of superconductivity in solid O2 on the border of an insulator-metal transition at high pressures close to 96 GPa is thus truly remarkable. Neither the insulator-metal transition nor superconductivity are understood satisfactorily. Here, we undertake a first step in this direction by focussing on the pressure-driven insulator-metal transition using a combination of first-principles density-functional and many-body calculations. We report a striking result: the finding of an orbital-selective Mott transition in a pure p-band elemental system. We apply our theory to understand extant structural and transport data across the transition, and make a specific two-fluid prediction that is open to future test. Based thereupon, we propose a novel scenario where soft multiband modes built from microscopically coexisting itinerant and localized electronic states are natural candidates for the pairing glue in pressurized O2.
format	article
author	Luis Craco Mukul S. Laad Stefano Leoni
author_facet	Luis Craco Mukul S. Laad Stefano Leoni
author_sort	Luis Craco
title	Microscopic description of insulator-metal transition in high-pressure oxygen
title_short	Microscopic description of insulator-metal transition in high-pressure oxygen
title_full	Microscopic description of insulator-metal transition in high-pressure oxygen
title_fullStr	Microscopic description of insulator-metal transition in high-pressure oxygen
title_full_unstemmed	Microscopic description of insulator-metal transition in high-pressure oxygen
title_sort	microscopic description of insulator-metal transition in high-pressure oxygen
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/b55c5188dcb341c29e7c45b40aa16259
work_keys_str_mv	AT luiscraco microscopicdescriptionofinsulatormetaltransitioninhighpressureoxygen AT mukulslaad microscopicdescriptionofinsulatormetaltransitioninhighpressureoxygen AT stefanoleoni microscopicdescriptionofinsulatormetaltransitioninhighpressureoxygen
_version_	1718388727381753856

Microscopic description of insulator-metal transition in high-pressure oxygen

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