Density Functional Theory for Molecular and Periodic Systems in TURBOMOLE: Theory, Implementation, and Applications

Area of Science:

• Quantum Chemistry
• Materials Science
• Computational Physics

Background:

• Density Functional Theory (DFT) is a powerful quantum mechanical modeling method.
• Treating periodic systems and relativistic effects requires advanced computational techniques.
• The TURBOMOLE software package offers a platform for these advanced calculations.

Purpose of the Study:

• To provide a comprehensive overview of DFT methods for molecular and periodic systems within TURBOMOLE.
• To review recent developments and extensions of DFT, including relativistic effects and real-time dynamics.
• To showcase applications and introduce a user-friendly interface for DFT studies.

Main Methods:

• Gaussian-type orbitals (GTOs) basis set implementation.
• Efficient real-space techniques and density-fitting for Coulomb interactions.
• Two-component formalisms for spin-orbit coupling and effective core potentials for relativistic effects.

Main Results:

• Demonstration of capabilities for bulk materials, surfaces, and nanostructures.
• Successful integration of embedding schemes with correlated wave function methods.
• Development of a web-based graphical interface for enhanced usability.

Conclusions:

• The TURBOMOLE implementation provides a robust framework for periodic DFT calculations.
• Recent advancements enable accurate treatment of complex systems, including relativistic phenomena.
• The software and associated interface serve as a valuable resource for computational chemistry and materials science research.