Lectures
Lecturer Prof. Dr. J. Kröger
Solid State Physics 1
The lectures intend to lay the foundations for modern solid state physics. First, the interaction between atoms and the classification of crystal structures will be discussed. Diffraction methods for structural analysis motivate the notion of the reciprocal lattice, the Ewald construction, the structure and the atomic form factor. The students will then be confronted with the dispersion relation of acoustic and optical phonons. The Einstein and Debye model belong to important results of this part of the lectures. Anharmonic effects will be introduced on the basis of thermal expansion and heat conduction. The electronic structure of solids represents another focus of these lectures. The Drude model of a classical electron gas serves as a starting point to describe the Wiedemann-Franz law and the Hall effect. Subsequently, the Sommerfeld model takes the Pauli principle into account and treats the electrons as a fermion gas. In the Bloch model the nearly free electron gas interacts with the ions via a periodic lattice potential. We will then deal with the motion of an electron gas in an external magnetic field.
The resulting Landau levels will help to understand the de Haas - van Alphen oscillations.
Semiconductor physics covers direct, indirect, intrinsic and doped semiconductors. In addition,
interfaces between semiconductors and the Schottky contact will be addressed. The dielectric
properties of solids conclude the lectures. The dielectric function will be elaborated and applied to the dispersion of plasmons, phonons, plasmon polaritons and phonon polaritons.
Exercise
Information on and access to the exercise series will be announcedduring the lectures.
Modules
Technical Physics 1 (TPh), Physical Optics (OTR, until academic regulations of 2008)