Fig. 4: Phonon properties and electron-phonon coupling of M2B2-based monolayers.
From: High-Tc 2D ambient BCS superconductors in hydrogenated transition-metal borides

These plots show the weighted electron-phonon coupling (EPC) dispersion of the phonon, the projected phonon density of the states (PHDOS), the isotropic Eliashberg spectral function α2F(ω), and the spectrum-dependent electron-phonon coupling λ(ω) of 2D M2B2H4, M2B2H, and M2B2.