Prediction of several Co-based La$_3$Ni$_2$O$_7$-like superconducting materials

Jing-Xuan Wang; Yi-Heng Tian; Jian-Hong She; Rong-Qiang He; Zhong-Yi Lu

paper

Prediction of several Co-based La $_{3}$ Ni $_{2}$ O $_{7}$ -like superconducting materials

arXiv:2509.09664

Abstract

High-temperature superconductivity has been found in Fe-, Ni-, and Cu-based compounds but has remained elusive in Co-based materials. The recent discovery of superconductivity in pressurized bilayer nickelate La $_{3}$ Ni $_{2}$ O $_{7}$ has renewed interest in related layered systems. Here, we predict several Co-based analogs that may realize similar physics. Electron doping of the high-pressure bilayer cobaltate La $_{3}$ Co $_{2}$ O $_{7}$ yields LaTh $_{2}$ Co $_{2}$ O $_{7}$ , La $_{3}$ Ni $_{2}$ O $_{5}$ Cl $_{2}$ , and La $_{3}$ Ni $_{2}$ O $_{5}$ Br $_{2}$ , which exhibit closely related crystal structures and strongly correlated electronic states. Random-phase-approximation calculations reveal $s$ -wave as the leading pairing symmetry in these compounds.

7 pages, 4 figures, 3 tables

Prediction of several Co-based La3​Ni2​O7​-like superconducting materials

Abstract

Prediction of several Co-based La $_{3}$ Ni $_{2}$ O $_{7}$ -like superconducting materials