Arun Prasath said:Thank you Kholdstare.
Yes they have given the tutorial in their website.Their tutorial describes general structure of input file. And I could run the default example files which are given in Quantum Espresso (QE). But my doubt is how to create my own input file for my chosen material.
Density Functional Theory (DFT) is a computational method used to predict the electronic structure and properties of molecules and materials. It is based on the concept of density, which is a measure of the number of electrons per unit volume in a system.
DFT works by solving the Schrödinger equation, which describes the behavior of electrons in a system, using a set of mathematical approximations and functionals. These approximations take into account the electronic density and the interactions between electrons and atoms.
DFT is a powerful tool for studying the electronic structure and properties of complex systems. It is relatively fast and accurate compared to other computational methods, making it useful for a wide range of applications in chemistry, physics, and materials science.
One of the main limitations of DFT is its inability to accurately describe systems with strong electron correlation, such as transition metal complexes and molecules with open-shell electronic configurations. Additionally, DFT relies on approximations and can give inaccurate results if the chosen functional is not appropriate for the system being studied.
DFT is used in a variety of research fields, including drug design, materials development, and catalysis. In industry, it is used to design new materials and optimize their properties, as well as to predict the behavior of chemicals and reactions in industrial processes.