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| Paper IPM / Physic / 17772 |
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We study the effects of Kohn anomalies on the superconducting properties in electron- and hole-doped cases of monolayer blue phosphorene (BLP), considering both adiabatic and non-adiabatic phonon dispersions using first-principles calculations. We show that the topology of the Fermi surface is crucial for the formation of Kohn anomalies of doped BLP. By using the anisotropic Eliashberg formalism, we further carefully consider the temperature dependence of the non-adiabatic phonon dispersions. In cases of low hole densities, strong electronâphonon coupling (EPC) leads to a maximum critical temperature of âK for superconductivity. In electron-doped regimes, on the other hand, a maximum superconducting critical temperature of âK is reached at a doping level that includes a Lifshitz transition point. Furthermore, our results indicate that the most prominent component of EPC arises from the coupling between an in-plane (out-of-plane) deformation and in-plane (out-of-plane) electronic states of the electron (hole) type doping.
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