Generalized Substrate Screening GW for Covalently Bonded Interfaces

Area of Science:

• Computational materials science
• Surface science
• Quantum chemistry

Background:

• Accurate interfacial electronic structure is crucial for designing heterogeneous materials.
• First-principles GW calculations are accurate but computationally expensive for large systems.
• Existing substrate screening GW methods fail for covalently bonded interfaces.

Purpose of the Study:

• To develop an efficient and accurate computational method for analyzing covalently bonded interfaces.
• To extend the substrate screening GW approach to handle complex interfacial bonding.

Main Methods:

• Developed a generalized substrate screening GW approach.
• Incorporated efficient calculation of interfacial covalent bond contributions to polarizability.
• Approximated adsorbate contributions using protonated molecule data.

Main Results:

• Successfully applied the generalized substrate screening GW approach to benzene-1,4-dithiol (BDT) on Au(111) interfaces.
• Demonstrated accurate and efficient GW calculations for systems with Au-S covalent bonds.
• Validated the method's robustness for covalently bonded interfaces.

Conclusions:

• The generalized substrate screening GW approach offers a robust and simple scheme for accurate electronic structure calculations.
• This method facilitates the design of advanced heterogeneous materials with covalent interfaces.
• Enables efficient computational screening of materials for various applications.