FISICA DELLO STATO SOLIDO I

Degree course: 
Corso di Second cycle degree in Physics
Academic year when starting the degree: 
2014/2015
Year: 
1
Academic year in which the course will be held: 
2014/2015
Course type: 
Compulsory subjects, characteristic of the class
Credits: 
6
Period: 
First Semester
Standard lectures hours: 
48
Detail of lecture’s hours: 
Lesson (48 hours)
Requirements: 

Knowledge of the principles and techniques of Quantum Physics and Physics of Matter

Assessment: 
Voto Finale

This course module aims at introducing the first elements of a systematic theory of the crystalline solid, with particular emphasis on the electronic and transport properties.

Classical Drude theory for the conductivity of metals. Fermi-Dirac distribution and the Drude-Sommerfeld theory of metals.
Crystals and crystal lattices. Bravais lattices, with and without poly-atomic basis, notable examples.
The reciprocal lattice of a Bravais lattice, notable examples. Miller indices for denoting crystal faces.
Elements of X-ray diffraction theory for the determination of crystal structures. Structure factor and form factor for poly-atomic based crystals.
Electronic energy bands in the presence of periodic potentials: Bloch theorem, Fermi surface, density of states and Van Hove singularities.
The nearly-free electron model and resulting electronic energy bands, the tight-binding model for the determination of the electronic band structure. Elements of density-functional theory for the electronic band structure.
The semi-classic theory of motion of electrons in crystal solids. Classification of metals, semi-metals, semi-conductors and insulators.
Semi-classical theory of conductivity in metals. Landau levels for electrons in a uniform magnetic field; the de Haas – van Alphen effect and measurement of the Fermi surface of metals.
Elementary theory of the electron-electron interaction in a solid; the Hartree and Hartree-Fock approximations, electronic correlations, electron screening, Thomas-Fermi theory and Lindhard theory for the electron screening. Elements of Landau theory of Fermi liquids and of the theory of the Mott transition.
Classical and quantum theory of lattice vibrations, the heat capacity of crystal insulators and the Debye-Einstein theory of lattice vibrations. An-harmonic effects in crystals.
Elements of the dielectric properties of insulators and the optical properties of solids.
General theory of semi-conductors, statistics of carriers (electrons and holes), conductivity, doping, impurity levels and conductivity. Doped semi-conductors, theory of the p-n junction.
Diamagnetism and paramagnetism in solids: insulators and metals. Electron interaction and magnetic structure of the magnetic solids, Heisenberg model for the exchange interaction between the elementary magnetic spin moments. Ferromagnetism and anti-ferromagnetism.

Classroom lectures, including both illustration of theory and applications/examples.

N.W. Ashcroft and N.D. Mermin, Solid-State Physics (Saunders College Publishing, Philadelphia 1976)
C. Kittel, Introduzione alla Fisica dello Stato Solido (Casa Editrice Ambrosiana 2008)
Oral examination, or written and oral examination (according to student wishes) where some topics of the course are discussed also by means of examples and applications.

Professors