Elastic properties, Debye temperature, density of states and electron-phonon coupling of ZrB12 under pressure

► The elastic and electronic properties of ZrB12 under pressure were studied by first-principles calculations. ► The electron-phonon coupling constant was calculated employing the McMillan equation. ► The electron-phonon coupling constant of ZrB12 decreases with pressure. ► The ZrB12 is a weak-coupled superconductor. ► The density of states at the Fermi level under pressure decreases.