Model Construction and a Possibility of Cupratelike Pairing in a New d9 Nickelate Superconductor (Nd, Sr)NiO2

Model Construction and a Possibility of Cupratelike Pairing in a New d9 Nickelate Superconductor (Nd, Sr)NiO2

Effective models are constructed for a newly discovered superconductor (Nd, Sr) NiO2, which has been considered as a possible nickelate analog of the cuprates. Estimation of the effective interaction, which turns out to require a multiorbital model that takes account of all the orbitals involved on...

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Veröffentlicht in:Physical review letters 2020-08, Vol.125 (7), p.1
Hauptverfasser: Sakakibara, Hirofumi, Usui, Hidetomo, Suzuki, Katsuhiro, Kotani, Takao, Aoki, Hideo, Kuroki, Kazuhiko
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Cuprates
Fermi surfaces
Superconductivity
Transition temperature
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container_issue 7
container_start_page 1
container_title Physical review letters
container_volume 125
creator Sakakibara, Hirofumi
Usui, Hidetomo
Suzuki, Katsuhiro
Kotani, Takao
Aoki, Hideo
Kuroki, Kazuhiko
description Effective models are constructed for a newly discovered superconductor (Nd, Sr) NiO2, which has been considered as a possible nickelate analog of the cuprates. Estimation of the effective interaction, which turns out to require a multiorbital model that takes account of all the orbitals involved on the Fermi surface, shows that the effective interactions are significantly larger than in the cuprates. A fluctuation exchange study suggests occurrence of dx2−y2-wave superconductivity, where the transition temperature should be lowered from the cuprates due to the larger interaction.
doi_str_mv 10.1103/PhysRevLett.125.077003
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source American Physical Society Journals; EZB-FREE-00999 freely available EZB journals
subjects Cuprates
Fermi surfaces
Superconductivity
Transition temperature
title Model Construction and a Possibility of Cupratelike Pairing in a New d9 Nickelate Superconductor (Nd, Sr)NiO2
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