Journal
PHYSICAL REVIEW LETTERS
Volume 125, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.125.077003
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Funding
- JSPS KAKENHI [JP17K05499, JP18H01860]
- Computing System for Research in Kyushu University (ITO system)
- supercomputer system HOKUSAI in RIKEN
- supercomputer system (system-B) in the Institute for Solid State Physics, the University of Tokyo
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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 d(x2-y2)-wave superconductivity, where the transition temperature should be lowered from the cuprates due to the larger interaction.
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