Solid-state physics deals with a system of $N$ electrons and nuclei. The Schrödinger equation for this many-body system is unsolvable exactly for $N > 1$.
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Plotting the dispersion relations along high-symmetry paths in the Brillouin zone. Solid-state physics deals with a system of $N$
Because solids are periodic, integration is done over reciprocal space (k-space). Keep your optimized ecutwfc constant. This link or copies made by others cannot be deleted
If you are a student or researcher, starting with the is highly recommended. Download/Buy the book and explore the GitHub source files.
Calculating interatomic force constants to plot phonon bands.
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