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<p>Recently discovered infinite-layer nickelates share a cuprate-like structure, thereby providing a promising platform for elucidating the mechanism of high-temperature superconductivity. Motivated by recent photoemission measurements on the La<sub>0.8</sub>Sr<sub>0.2</sub>NiO<sub>2</sub>, we carry out a systematic study of the infinite-layer nickelate using both dynamical mean-field theory and density matrix embedding theory. The renormalized electronic structure and Fermi surface of correlated La<sub>0.8</sub>Sr<sub>0.2</sub>NiO<sub>2</sub> are studied in an effective two-band model through the dynamical mean-field calculation. We find the correlation effects reflect mainly on the Ni <i>d</i> band, which is consistent with the experimental findings. We further study the ground state through the density matrix embedding theory. Within the experimental doping range and rigid-band approximation, we show that the <i>d</i>-wave superconductivity is the lowest energy state, while the static magnetism is absent except very close to zero doping.</p>

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Electronic structure and superconducting properties of LaNiO2

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月28日

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  • Ziyan Chen,
  • Yuxin Wang,
  • Kun Jiang,
  • Jiangping Hu

摘要

Recently discovered infinite-layer nickelates share a cuprate-like structure, thereby providing a promising platform for elucidating the mechanism of high-temperature superconductivity. Motivated by recent photoemission measurements on the La0.8Sr0.2NiO2, we carry out a systematic study of the infinite-layer nickelate using both dynamical mean-field theory and density matrix embedding theory. The renormalized electronic structure and Fermi surface of correlated La0.8Sr0.2NiO2 are studied in an effective two-band model through the dynamical mean-field calculation. We find the correlation effects reflect mainly on the Ni d band, which is consistent with the experimental findings. We further study the ground state through the density matrix embedding theory. Within the experimental doping range and rigid-band approximation, we show that the d-wave superconductivity is the lowest energy state, while the static magnetism is absent except very close to zero doping.