Rich p-type-doping phenomena in boron-substituted silicene systems

Area of Science:

• Materials Science
• Condensed Matter Physics
• Computational Chemistry

Background:

• Monolayer silicene exhibits unique electronic properties due to its 2D structure.
• Doping silicene is a key strategy to tune its electronic characteristics.

Purpose of the Study:

• To investigate the effects of boron substitution on the electronic properties of monolayer silicene.
• To analyze the resulting changes in band structure, charge distribution, and bonding.

Main Methods:

• First-principles calculations were employed to model boron-substituted silicene.
• Analysis included Moire superlattices, band structures, charge densities, and van Hove singularities.

Main Results:

• Hybridized 2p-3p and [2s, 2p]-[3s, 3p] bondings were identified.
• Boron substitution led to a red-shifted Fermi level and modified Dirac, pi, and sigma bands.
• Charge transfer resulted in a non-uniform chemical environment.

Conclusions:

• Boron substitution significantly enriches the essential properties of monolayer silicene.
• The diverse electronic properties arise from the non-uniform chemical environment induced by charge transfer.
• This study provides a theoretical framework for understanding and designing novel electronic materials.