Simple correction to bandgap problems in IV and III-V semiconductors: an improved, local first-principles density...

Area of Science:

• Condensed Matter Physics
• Materials Science
• Computational Chemistry

Background:

• Accurate prediction of material properties is crucial for technological advancement.
• Existing computational methods face challenges in balancing efficiency and accuracy for electronic structure calculations.
• The development of novel computational techniques is essential for exploring new materials.

Purpose of the Study:

• To introduce and validate a fast, efficient, first-principles computational method: the full-potential Nth-order muffin-tin orbital (FP-NMTO) method.
• To demonstrate the critical role of a complete and compact basis set in improving electronic and structural property predictions.
• To showcase the applicability of the FP-NMTO method to various semiconductor materials.

Main Methods:

• Implementation of the first-principles full-potential Nth-order muffin-tin orbital (FP-NMTO) method.
• Incorporation of the van Leeuwen-Baerends correction for local density exchange-correlation potential.
• Application of self-consistent FP-NMTO calculations to group IV and III-V semiconductors, and 2D materials (h-BN, h-SiC).

Main Results:

• FP-NMTO method combined with van Leeuwen-Baerends correction provides accurate predictions of electronic and structural properties.
• Calculations on Ge show good agreement with experimental values for bandgaps, lattice constants, and bulk moduli.
• Successful application to 2D materials like hexagonal boron nitride (h-BN) and hexagonal silicon carbide (h-SiC) demonstrates broad utility.

Conclusions:

• The FP-NMTO method offers a computationally efficient and accurate approach for electronic structure calculations.
• The choice of a complete and compact basis set significantly enhances the predictive power of the FP-NMTO method.
• FP-NMTO is a promising tool for investigating the properties of semiconductors and 2D materials, aiding in materials discovery and design.