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Learn advanced concepts in Density Functional Perturbation Theory (DFPT) focusing on forces, response functions, and phonons in this second part of a comprehensive lecture series. Explore the theoretical foundations and practical applications of DFPT methods for calculating vibrational properties of materials, understanding how forces relate to response functions, and computing phonon spectra. Gain insights into the mathematical framework underlying these quantum mechanical calculations and their implementation in computational materials science. Discover how DFPT enables efficient computation of dynamical matrices and phonon dispersions without the need for supercell approaches, making it a powerful tool for studying lattice dynamics in crystalline materials.
