Orbital-selective pairing and superconductivity in iron selenides

Unconventional superconductivity: Orbital selective pairing in iron selenides Orbital-selective pairing could explain the unusual properties observed in the unconventional superconductor iron selenide. Conventional superconductivity arises when electrons form Cooper pairs due to electron-phonon coup...

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Autores principales:	Emilian M. Nica, Rong Yu, Qimiao Si
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
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/24ef94ed9dad4069bdf941603c99b66d
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spelling	oai:doaj.org-article:24ef94ed9dad4069bdf941603c99b66d2021-12-02T14:22:33ZOrbital-selective pairing and superconductivity in iron selenides10.1038/s41535-017-0027-62397-4648https://doaj.org/article/24ef94ed9dad4069bdf941603c99b66d2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41535-017-0027-6https://doaj.org/toc/2397-4648Unconventional superconductivity: Orbital selective pairing in iron selenides Orbital-selective pairing could explain the unusual properties observed in the unconventional superconductor iron selenide. Conventional superconductivity arises when electrons form Cooper pairs due to electron-phonon coupling. In some materials, however, unconventional superconductivity can arise, which is driven by electron-electron rather than electron-phonon couplings. The detailed mechanism that facilitates electron pairing in unconventional systems remains elusive but iron selenide systems could help to provide insights as they exhibit both relatively high temperature superconductivity, and also strong electron correlations. With different experiments suggesting different pairing mechanisms, however, these systems are somewhat puzzling. An international team of researchers led by Qimiao Si from Rice University now theoretically demonstrate that an orbital-selective pairing state could explain this unusual behaviour, which may also be at play in other unconventional superconductors such as heavy fermion and organic systems.Emilian M. NicaRong YuQimiao SiNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Atomic physics. Constitution and properties of matterQC170-197ENnpj Quantum Materials, Vol 2, Iss 1, Pp 1-7 (2017)
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 Emilian M. Nica Rong Yu Qimiao Si Orbital-selective pairing and superconductivity in iron selenides
description	Unconventional superconductivity: Orbital selective pairing in iron selenides Orbital-selective pairing could explain the unusual properties observed in the unconventional superconductor iron selenide. Conventional superconductivity arises when electrons form Cooper pairs due to electron-phonon coupling. In some materials, however, unconventional superconductivity can arise, which is driven by electron-electron rather than electron-phonon couplings. The detailed mechanism that facilitates electron pairing in unconventional systems remains elusive but iron selenide systems could help to provide insights as they exhibit both relatively high temperature superconductivity, and also strong electron correlations. With different experiments suggesting different pairing mechanisms, however, these systems are somewhat puzzling. An international team of researchers led by Qimiao Si from Rice University now theoretically demonstrate that an orbital-selective pairing state could explain this unusual behaviour, which may also be at play in other unconventional superconductors such as heavy fermion and organic systems.
format	article
author	Emilian M. Nica Rong Yu Qimiao Si
author_facet	Emilian M. Nica Rong Yu Qimiao Si
author_sort	Emilian M. Nica
title	Orbital-selective pairing and superconductivity in iron selenides
title_short	Orbital-selective pairing and superconductivity in iron selenides
title_full	Orbital-selective pairing and superconductivity in iron selenides
title_fullStr	Orbital-selective pairing and superconductivity in iron selenides
title_full_unstemmed	Orbital-selective pairing and superconductivity in iron selenides
title_sort	orbital-selective pairing and superconductivity in iron selenides
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/24ef94ed9dad4069bdf941603c99b66d
work_keys_str_mv	AT emilianmnica orbitalselectivepairingandsuperconductivityinironselenides AT rongyu orbitalselectivepairingandsuperconductivityinironselenides AT qimiaosi orbitalselectivepairingandsuperconductivityinironselenides
_version_	1718391474009145344

Orbital-selective pairing and superconductivity in iron selenides

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