prl125(7)_077003.pdf 1.32 MB
Sakakibara, Hirofumi Department of Applied Mathematics and Physics, Tottori University / Advanced Mechanical and Electronic System Research Center(AMES), Tottori University / Computational Condensed Matter Physics Laboratory, RIKEN Cluster for Pioneering Research (CPR) 研究者総覧 KAKEN
Usui, Hidetomo Department of Physics and Materials Science, Shimane University
Suzuki, Katsuhiro Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University
Aoki, Hideo National Institute of Advanced Industrial Science and Technology (AIST) / Department of Physics, The University of Tokyo
Kuroki, Kazuhiko Department of Physics, Osaka University
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.
PHYSICAL REVIEW LETTERS
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Sakakibara Hirofumi, Usui Hidetomo, Suzuki Katsuhiro, et al. Model Construction and a Possibility of Cupratelike Pairing in a New d(9) Nickelate Superconductor (Nd,Sr)NiO2. PHYSICAL REVIEW LETTERS. 2020. 125(7). doi:10.1103/PhysRevLett.125.077003
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