Crystal lattices, diffraction from a lattice, reciprocal lattice. Drude model of conduction in metals - electrical end thermal Conductivity, Sommerfeld correction - ideal Fermi gas, electronic heat capacity. Quantum theory of conduction - Bloch's theorem, energy bands, electrons and holes, effective mass, Fermi surface, electron dynamics in a magnetic field, band structures of semiconductors ? the intrinsic state, statistics of charge carriers, impurity levels, optical properties - excitons, lattice dynamics-phonons, heat capacity, optical properties of ionic crystals. 

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