Strain-engineering tunable electron mobility of monolayer IV-V group compounds.

Area of Science:

• Materials Science
• Condensed Matter Physics
• Solid State Physics

Background:

• Two-dimensional (2D) semiconductors offer unique electronic properties.
• Controlling charge carrier mobility is crucial for advanced electronic devices.
• Monolayer group IV-V materials represent a novel class of 2D semiconductors.

Purpose of the Study:

• To investigate the electronic properties and charge carrier mobility of new monolayer group IV-V semiconductors.
• To explore the effects of strain engineering on the band structure and electrical transport.
• To demonstrate a method for achieving tunable electron mobility in these materials.

Main Methods:

• First-principles simulations were employed to model the material properties.
• Band structure calculations were performed to understand electronic characteristics.
• Strain engineering was systematically applied to analyze its impact on electron mobility.

Main Results:

• Anisotropic and high electron mobility was demonstrated in monolayer IV-V semiconductors.
• Conduction bands were found to be sensitive to armchair-direction strain.
• Electron mobility in the armchair direction can be tuned (improved or deteriorated) by applying strain.
• Controllable strain introduction offers flexibility in electrical transport.

Conclusions:

• Monolayer IV-V semiconductors possess tunable electron mobility via strain engineering.
• This tunability opens new avenues for controlling electrical transport in 2D materials.
• The findings are significant for developing novel mechanical-electronic devices with mobility switching capabilities.