##### Quantum Mechanics Free Electron Theory and Band theory of Solids

Quantum Mechanics– Dual nature of matter – Schrodinger’s time independent and dependent wave

equation – Significance of wave function – Particle in a one–dimensional infinite potential well.

Free Electron Theory– Classical free electron theory (Merits and demerits only) – Quantum free

electron theory – Equation for electrical conductivity based on quantum free electron theory – Fermi–

Dirac distribution – Density of states – Fermi energy.

Band theory of Solids– Bloch’s Theorem (Qualitative) – Kronig–Penney model (Qualitative) – E vs K

diagram – Classification of crystalline solids – Effective mass of electron – m* vs K diagram –

Concept of hole.