Work

Superconducting properties of doped blue phosphorene: effects of non-adiabatic approach

Year: 2022

Type: article

Abstract: 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 electron–phonon coupling (EPC) leads to a maximum critical temperature of T c = 97 K for superconductivity. In electron-doped regimes, on the other hand, a maximum superconducting critical temperature of T c = 38 K 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.

Source: 2D Materials

DOI: 10.1088/2053-1583/ac9069

Authors: Mohammad Alidoosti, Davoud Nasr Esfahani, Reza Asgari

Institutions: Pasargad Institute for Advanced Innovative Solutions, Khatam University, UNSW Sydney, Institute for Research in Fundamental Sciences

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Iran Science Elites Federation, Centre of Excellence in Future Low-Energy Electronics Technologies, Australian Research Council

Awards: G2659024479, G6746697864