Prediction of phonon-mediated superconductivity in borophene

Abstract

Superconductivity in two-dimensional compounds is widely concerned, not only due to its application in constructing nano-superconducting devices, but also for the general scientific interests. Very recently, borophene (two-dimensional boron sheet) has been successfully grown on the Ag(111) surface, through direct evaporation of a pure boron source. The experiment unveiled two types of borophene structures, namely ${\beta }_{12}$ and ${\chi }_3$. Herein, we employed density-functional first-principles calculations to investigate the electron-phonon coupling and superconductivity in both structures of borophene. The band structures of ${\beta }_{12}$ and ${\chi }_3$ borophenes exhibit inherent metallicity. We found electron-phonon coupling constants in the two compounds are larger than that in MgB${}_2$. The superconducting transition temperatures were determined to be 18.7 K and 24.7 K through McMillian-Allen-Dynes formula. These temperatures are much higher than theoretically predicted 8.1 K and experimentally observed 7.4 K superconductivity in graphene. Our findings will enrich the nano-superconducting device applications and boron-related material science.

accepted for publication in Phys. Rev. B

References in corpus (9)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Experimental Realization of Two-Dimensional Boron Sheets
• Superconductivity in single-layer films of FeSe with a transition temperature above 100 K
• Novel Precursors for Boron Nanotubes: The Competition of Two-Center and Three-Center Bonding in Boron Sheets
• Arsenene: Two-dimensional buckled and puckered honeycomb arsenic systems
• Direct Evidence of Metallic Bands in a Monolayer Boron Sheet
• Tuning the Band Gap in Silicene by Oxidation
• Electron-doped phosphorene: A potential monolayer superconductor
• The formation of boron sheet at the Ag(111) surface: From clusters, ribbons, to monolayers

Cited by in corpus (33)

• Review of borophene and its potential applications
• Anisotropic carrier mobility of distorted Dirac cones: theory and application
• High-Throughput DFT-Based Discovery of Next Generation Two-Dimensional (2D) Superconductors
• Prediction of phonon-mediated superconductivity with high critical temperature in the two-dimensional topological semimetal W2N3
• Strong coupling superconductivity in trilayer film LiB${}_2$C${}_2$
• New crystal structure prediction of fully hydrogenated borophene by first principles calculations
• Phonon-mediated superconductivity in two-dimensional hydrogenated phosphorus carbide: HPC${}_3$
• Electron-phonon coupling superconductivity in 2D orthorhombic MB6 (M=Mg, Ca) and hexagonal MB6 (M=Mg, Ca, Sc, Ti, Sr, Y)
• Nanoscale probing of image-potential states and electron transfer doping in borophene polymorphs
• Electron-phonon interaction in Ca2N monolayer: intrinsic mobility of electrene
• A review of thermal transport and electronic properties of borophene
• Current-Voltage Characteristics of Borophene and Borophane Sheets
• Peculiar bonding associated with atomic doping and hidden honeycombs in borophene
• Superconductivity in electron-doped arsenene
• Electron-phonon coupling in a honeycomb borophene grown on Al(111) surface
• Signatures of non-adiabatic superconductivity in lithium-decorated graphene
• Thermoelectric transport properties of borophane
• Strain-tunable Dirac semimetal phase transition and emergent superconductivity in a borophane
• Hyperbolic plasmon modes in tilted Dirac cone phases of borophene
• Effect of Doping on the phase stability and Superconductivity in LaH10
• First-principles study of the superconductivity in LaO
• 2D Ladder polyborane: an ideal Dirac semimetal with a multi-feld-tunable band gap
• Triggering superconductivity, semiconducting states, and ternary valley structure in graphene via functionalization with Si-N layers
• Mini Band Gap Generation in Magnetic Beta-Borophene: Effects of Optical Phonon Interaction
• Resonant tunneling in disordered borophene nanoribbons with line defects
• Absence of sizable superconductivity in hydrogen boride: A first principles study
• Universal Scaling in Intrinsic Resistivity of Two-Dimensional Metal Borophene
• Electronic and Optical Properties of Ta${}_2$NiSe${}_5$ Monolayer: A First-principles Study
• Tunable wavevector filtering in borophane based normal metal-barrier-normal metal junctions
• Robust Ferrimagnetic Ground State and Suppressed Superconductivity in Two-Dimensional HC6
• Computational design of a new layered superconductor LaOTlF2
• Tetragonal-phase SnOFeSe: A possible parent compound of FeSe-based superconductor
• Strain-triggered high-temperature superconducting transition in two-dimensional carbon allotrope