Local electronic descriptors for solute-defect interactions in bcc refractory metals.

Area of Science:

• Materials Science
• Solid State Physics
• Computational Materials Science

Background:

• Solute-defect interactions significantly influence alloy properties.
• Understanding these interactions is crucial for designing advanced materials.

Purpose of the Study:

• To establish a general linear correlation between local electronic structure descriptors and solute-defect interaction energies.
• To enable quantitative and efficient predictions of solute-defect interactions in binary alloys.

Main Methods:

• Analysis of local electronic structure descriptors, specifically d-orbital density of states bimodality and sp-d hybridization strength.
• Investigating binary alloys of body-centered-cubic (bcc) refractory metals (e.g., W, Ta) with transition-metal substitutional solutes.

Main Results:

• A general linear correlation was identified between the two electronic descriptors and solute-defect interaction energies.
• This correlation holds true regardless of the defect type or substitutional site location for a given solute-matrix pair.

Conclusions:

• Local electronic structure descriptors can be effectively used to predict solute-defect interactions.
• This approach offers a pathway for efficient and quantitative predictions of defect properties in alloys.