Lecture Notes of Professor Yuri Kagan in Theoretical Solid-State Physics

This textbook explores foundational and cutting-edge topics in condensed matter physics. Inspired by the influential work of Prof. Yuri Kagan, the book spans key areas such as Bose-Einstein condensation, superfluid helium, crystal lattice dynamics, and phonon physics. It also addresses electronic excitations in metals and superconductors, including the BCS theory, electron-phonon interactions, and...