We report a comprehensive investigation of the physical properties of LuOs3B2, characterized by an ideal Os-based kagome lattice. Resistivity and magnetization measurements confirm the emergence of type-II bulk superconductivity with a critical temperature Tc=4.63 K. The specific heat jump and the calculated electron-phonon coupling parameter support a moderately coupled superconducting state. Electron correlation effects are supported by the enhanced Wilson ratios. First-principles calculations reveal hallmark features of kagome band structure, including Dirac points, van Hove singularities, and quasi-flat bands, primarily derived from the Os d orbitals. The inclusion of spin-orbit coupling opens a gap at the Dirac points, significantly altering the electronic properties. Furthermore, the superconductivity and electronic properties of isomorphic compounds are discussed. This work provides a thorough exploration of the superconducting and normal states of LuOs3B2, deepening the understanding of kagome superconductors.
@article{arxiv.2504.16412,
title = {Superconductivity and Electron Correlations in Kagome Metal LuOs3B2},
author = {Yusen Xiao and Qingchen Duan and Tao Jia and Yajing Cui and Shaohua Liu and Zhiwei Wen and Liangwen Ji and Ruidan Zhong and Yongliang Chen and Yong Zhao},
journal= {arXiv preprint arXiv:2504.16412},
year = {2026}
}