Modulation of superconductivity and superhardness in XB4C4 (X=Be,B,Al,Si,P, and Ti) borocarbides at ambient pressureRemoveQiwen Jiang, Zihao Huo, Zhengtao Liu, Ling Chen, Tiancheng Ma, Shuqing Jiang, Defang Duan, and Tian CuiPhys. Rev. B 111, 224515 (2025)