SOLID STATE PHYSICAL CHEMISTRY
Learning outcomes of the course unit
To provide Chemistry students a solid background of chemical physics of solids and materials.
Chemical Physics II
Course contents summary
PREPARATION AND CLASSIFICATION OF MATERIALS
Main methods of materials preparation. Gas, liquids and crystalline solids. Liquid crystals. Incommensurate structures.
Lattice, unit cell, space groups. Group of primitive traslaztions, and its irreducible representations. Factor group. Reciprocal lattice.Bloch theorem.
SIMMETRY AND PHASE TRANSTIONS
Symmetry breaking. First and second order phase transtions. Landau theory.
VIBRATIONS IN CRYSTALS
Vibrations in a monodimensional lattice, monatomic and biatomic.Periodic boundary conditions and Brillouin zones. Extension to tridimensional lattices: dynamic equation. Phonons. Experimental methods for the vibrational dispersion curves: infrared absorption,Raman scattering, X ray, neutron scattering. Density of states. Bose distribution and specific heat. Debye model.
ELECTRONIC STATES IN CRYSTALS
Tight binding method. Free electron and nearly free electron models. Fermi surface. Fermi distribution and electronic specific heat inmetals. Electron-electron interaction in metals: screening, Lindhardand, Thomas-Fermi equations. Electron-electron interactions in molecular crystals: Hubbard model. Electron-phonon interaction.
OPTICAL PROPERTIES OF SOLIDS
Absorrbance, reflectance, and Kramers-Kronig transformation. Optical spectra of metals:
plasme frequency, plasmons. Optical spectra of molecular crystals: excitons and factor group selection rules. Oriented gas model.
MAGNETIC PROPERTIES OF SOLIDS
Diamagnetism.Paramagnetism: Langevin and Van Vleck models. Ferromagnetism and antiferromagnetism: Curie-Weiss law. Microscopic model and Heisemberg hamiltonian. Ferrimagnetism.
ELECTRON MOTION AND TRANSPORT PROPERTIES
Metal conductivity: semiclassical model. Eletrons and holes. Resistance in metals. Semiconductors. Superconductors.
S. Elliott, "The Physics and Chemistry of Solids" (Wiley, 1998)
P.A. Cox, "The Electronic Structure and Chemistry of Solids" (Oxford University press, 1995)
Oral examination. The final evaluation is together with the course of 'Spettroscopia dei Solidi'.