8.2.1999 Background: Boltzmann factor (see note) Einstein model for heat capacity (2 notes) Debye model (see note) Copy from Kittel (review of Debye temperatures) (5 sheets of notes) 9.2.1999 Debye model Phonons again Heat conductivity Fourier Law (heat curent) Elementary transport/kinetic theory Expression for heat conductivity Phonon transport (scattering of phonons) (harmonic phonon -> plane wave, infinite) Anharmonic effects Umklapp processes (see the movies) Group velocity Temperature dependence of phonon heat conductivity (see the text) Relation el * sigma * rho = 1 Latex $$\rho \ \sigma \ \ell =1 $$ 15.02.1999 Drude's model Starting the Fermi Gas Model 16.02.1999 About Slater determinant: The wavefunction type for independent fermions Fermi energy, fermi momentum Fermi temperatur. Note: Density of states in a box, with Fermi quantities 22.02.1999 Fermi Gas Model closing Evaluation of Heat Capacity, Fermi Gas Model Note: 4 pages of notes on this subject (copied on 2 sheets) 23.02.1999 Last part of Heat Capacity, Fermi Gas Model More on Sommerfeld's model, heat conductivity (2 great errors in Drude's model cancel each other) Band theory: LCAO-type model - tight binding model Bloch States: theorems Starting the Fourier Method for Bloch states. (note in postscript) 01.03.99 Fourier method Explaining the number of states, how they couple Rearranging band matrices for every k from the 1. Brillouin zone there is a set of solutions (and how they are related to the other zones) 02.03.99 More aspects of the band theory The repeated zone schemes Relation between Bloch, Fourier, LCAO and the 'zero potential limit' picture 08.03.99 Computer experiments More on LCAO. 3-dimensional bands 09.03.99 Semiclassical Dynamics or transport properties on lattice 15.03.99 Transport properties on lattice Metals. Fermi surface 16.03.99 Metals. Fermi surface Matthiesens Rule (is in Ashcroft, also Kittel) Metals are polycrystals