Course Content (Syllabus)
Chemical Bonding in Solids, covalent & Ionic Bond .
Dynamics of Atoms in Crystals
Thermal properties: Density of States, thermal energy of a harmonic oscillator, specific heat capacity, Effects due to anharmonicity, thermal expansion, heat conduction by phonons.
The "Free" electrons in solids: The Free-Electron Gas in an Infinite Square-Well Potential, Fermi Gas at T = 0 K, Fermi statistics, specific heat capacity of electrons in metals.
The electronic Bandstructure of Solids: General symmetry properties, nearly free-electron approximation, Tight-binding approximation, examples of bandstructures, Density of states - in crystalline and in Non-Crystalline solids.
Motion of Electrons and Transport Phenomena: Motion of electrons in bands and the effective Mass, currents in bands and holes, relaxation time, electrical conductivity of metals.
Optical properties of Solids: Dielectric Function, absorption of electromagnetic radiation, dielectric function for a harmonic oscillator, longitudinal and transverse normal modes, free-electron Gas, interband transitions, excitons, dielectric energy Losses of Electrons..
Semiconductors: Bandstructure of important semiconductors, charge carrier density in intrinsic Semiconductors, doping of semiconductors, Conductivity of semiconductors.