Predictions of conventional superconductivity in light element compounds.

Density functional theory calculations were performed to study phonon-mediated superconductivity in light element systems at ambient pressures. A new family of 2D metal-borocarbide clathrane superconductors, derived from 3D XYB₆C₆ clathrates are presented. Hyrogen passivation and surface metal decoration stabilize the XYB₈C₈H₈ monolayers. In this newly predicted family of compounds in-plane anisotropy competes with superconductivity, reducing the superconducting critical temperature, T_c, despite favorable doping. Biaxial strain mitigates this anisotropy and enhances T_c. These findings identify 2D clathranes as promising, strain tunable, superconductors.