As a second part of the two-semester course on the solid state physics, we will focus on the fundamental phenomena and related physical concepts in condensed matter physics.

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This chapter previews general ideas and concepts in approaching condensed matter systems.

A solid, or, a condensed matter system in general, can be visualized as a mere collection of atoms. In this chapter, we will try to discuss what forms of matter one can possibly get out of the collection of ``hypothetical hydrogen'' atoms as a function of **temperature** and

We may consider crystalline solids as a periodic array of atoms or molecules at fixed positions, i.e., lattice points. However, since, at finite temperature, the atoms in a solid are in constant motion induced by the thermal energy, we need to device a picture or model for the description of such thermal motion of atoms.

Here we describe all the physical properties related to the lattice dynamics in terms of counting the number of ``phonon'' particles.

This chapter provides a basic picture for the description of many particle systems.

This chapter deals with a basic tool for the description of perturbative responses of many electron systems.

This chapter provides a broad overview on superconductivity.

This is a complementary chapter to the previous one featuring parts of the microscopic and phenomenological theory of superconductivity. One of the important concepts presented in this chapter is a key idea on the

one may skip the details as directed during the class.