A novel two-dimensional superconducting Ti layer: density functional theory and electron-beam irradiation

Area of Science:

• Materials Science
• Condensed Matter Physics
• Nanotechnology

Background:

• Graphene discovery spurred research into two-dimensional (2D) layered materials.
• 3d-transition metals offer unique physical properties and tunability in 2D materials.

Purpose of the Study:

• To synthesize and characterize a novel 2D titanium (Ti) nanosheet.
• To investigate the electronic and superconducting properties of the Ti monolayer.

Main Methods:

• Electron-beam irradiation of Ti_0.91O₂ nanosheet suspension.
• State-of-the-art density functional theory (DFT) calculations, including Hubbard U_eff.
• Analysis of phonon dispersion, electronic bands, and Fermi surface.

Main Results:

• Successful manufacture of a new 2D Ti nanosheet.
• Confirmation of the Ti monolayer as a non-magnetic superconductor with medium electron-phonon coupling.
• Demonstration of robustness under strain and analysis of electronic topological transitions.

Conclusions:

• The novel 2D Ti monolayer is a promising non-magnetic superconductor.
• Its robustness under strain and tunable electronic properties open avenues for 2D sensor applications.
• Encourages further exploration of d-metal-based monolayers for novel electronic devices.