Solid State Physics-1 Chapter no.1 Complete notes for free download

COURSE CONTENTS:

Chapter no.1

Crystal structures and Interatomic Forces:

Ø Solids:

The solids are the forms of matter in which atoms and molecules are strongly bound and maintain definite volume and shape unless changed by applying external forces.

Ø Solid State physics:

The study of the physical properties of the atomic/molecular matter in the solid-state these physical properties include crystal structure bonding, thermal, electrical, and magnetic properties.

The branch of physics which deals with crystals and electrons in crystal is called solid-state physics.

Ø States of matter

Ø Types of solid

Ø Crystalline solids

Ø Properties

Ø Why crystalline state is preferred by most solids?

Ø Amorphous solids

Ø Classification of crystalline solids

Ø Single crystals (long-range order exist)

Ø Polycrystal (short-range order)

Ø What are the properties of single crystals

Ø Space lattice

Ø Plane lattice

Ø Lattice points

Ø Lattice translation vector

Ø Primitive

Ø Non-primitive

Ø Unit cell

Ø Effective number

Ø Point group

Ø Wigner Seitz cell:

The smallest volume occupied by normal is the required primitive cell called the Wigner Seitz cell.

Ø Basis:

A regular arrangement of atom or group of atoms on each lattice point for the formation of a crystal structure such as the atoms or group of atoms are called basis.

Ø Symmetry operations

Ø Crystal symmetry

Ø Why 5-fold does not exist?

Ø Reflections

Ø Inversion

Ø Point group:

Symmetry operation performed about a point or a line are called point group.

There are a total of 10-point groups in the two-dimension lattice and A 32-point group in 3-D

Ø Space group:

Symmetry operations performed by translation as well as are called space group.

There is a total of 17 space group in two O lattice and 230 space group in the 3-D lattice.

Ø Equivalent pint in a lattice