Unusual spin-triplet superconductivity in monolayer graphene

Abstract

In this paper we consider the phonons in monolayer graphene and we show the possibility for the spin-triplet superconducting excitations states by discretizing the single-particle excitations near Fermi wave vector. The molonayer graphene was supposed to be exposed under the influence of the external gate-potential and the local Coulomb interaction effects have been taken into account at each lattice site position in the monolayer. A sufficiently large temperature domain was found, where the superconducting order parameter is not vanishing. Corresponding to this, at the surprisingly high temperature limit, we obtain a narrow domain of the electron-phonon coupling parameter ${\lambda }_{\mathrm{eff}}$, emphasizing the superconducting state. We discuss the localizing role of Hubbard-$U$ interaction and the effects external gate potential on the calculated physical parameters in the system. We explain the importance of the chemical potential in the formation of the superconducting state. We show the existence of a large superconducting band-gap in the system even in the case of the absence of the applied electric field potential.

21 pages, 13 figures

References in corpus (24)

• Electric Field Effect in Atomically Thin Carbon Films
• The electronic properties of graphene
• The Raman Fingerprint of Graphene
• Substrate-induced band gap opening in epitaxial graphene
• Kohn Anomalies and Electron-Phonon Interaction in Graphite
• Acoustic phonon scattering limited carrier mobility in 2D extrinsic graphene
• Electronic transport in graphene: A semi-classical approach including midgap states
• Superconducting states of pure and doped graphene
• Evidence for superconductivity in Li-decorated monolayer graphene
• Determination of the electronic structure of bilayer graphene from infrared spectroscopy results
• Electron-phonon coupling and electron self-energy in electron-doped graphene: calculation of angular resolved photoemission spectra
• Unconventional superconductivity in nearly flat bands in twisted bilayer graphene
• Interplay of Coulomb and electron-phonon interactions in graphene
• BCS superconductivity of Dirac electrons in graphene layers
• A revisit to phonon-phonon scattering in single-layer graphene
• Doped graphene as tunable electron-phonon coupling material
• Review of annealing effects and superconductivity in Fe${}_{1+y}$Te${}_{1-x}$Se${}_x$ superconductors
• Effect of electron-electron interaction on the Fermi surface topology of doped graphene
• Renormalization Group Approach to the Normal State of Copper-Oxide Superconductors
• Flat bands as a route to high-temperature superconductivity in graphite
• Probing enhanced electron-phonon coupling in graphene by infrared resonance Raman spectroscopy
• Self-consistent study of Anderson localization in the Anderson-Hubbard model in two and three dimensions
• Cooper instability generated by attractive fermion-fermion interaction in the two-dimensional semi-Dirac semimetals
• Fate of superconductivity in disordered Dirac and semi-Dirac semimetals