Exclude triplets tetrahedron from the class
Extend tetrahedron method of three phonons
Extend tetrahedron method of three phonons
Making interface for choosing the way to divide microzone by tetrahedra with 4 diagonals
Making interface for choosing the way to divide microzone by tetrahedra with 4 diagonals
C implementation of group velocity
Lattice has to be given by column vections.