402-0532-00L  Quantum Solid State Magnetism

SemesterFrühjahrssemester 2018
DozierendeA. Zheludev, K. Povarov
Periodizitätjährlich wiederkehrende Veranstaltung
LehrspracheEnglisch


KurzbeschreibungThis course is based on the principal modern tools used to study collective magnetic phenomena in the Solid State, namely correlation and response functions. It is quite quantitative, but doesn't contain any "fancy" mathematics. Instead, the theoretical aspects are balanced by numerous experimental examples and case studies. It is aimed at theorists and experimentalists alike.
LernzielLearn the modern theoretical foundations and "language", as well as principles and capabilities of the latest experimental techniques, used to describe and study collective magnetic phenomena in the Solid State.
Inhalt- Magnetic response and correlation functions. Analytic properties. Fluctuation-dissipation theorem. Experimental methods to measure static and dynamic correlations.

- Magnetic response and correlations in metals. Diamagnetism and paramagnetism. Magnetic ground states: ferromagnetism, spin density waves. Excitations in metals, spin waves. Experimental examples.

- Magnetic response and correlations of magnetic ions in crystals: quantum numbers and effective Hamiltonians. Application of group theory to classifying ionic states. Experimental case studies.

- Magnetic response and correlations in magnetic insulators. Effective Hamiltonians. Magnetic order and propagation vector formalism. The use of group theory to classify magnetic structures. Determination of magnetic structures from diffraction data. Excitations: spin wave theory and beyond. "Triplons". Measuring spin wave spectra.
SkriptA comprehensive textbook-like script is provided.
LiteraturIn principle, the script is suffient as study material. Additional reading:

-"Magnetism in Condensed Matter" by S. Blundell
-"Quantum Theory of Magnetism: Magnetic properties of Materials" by R. M. White
-"Lecture notes on Electron Correlations and Magnetism" by P. Fazekas
Voraussetzungen / BesonderesPrerequisite:
402-0861-00L Statistical Physics
402-0501-00L Solid State Physics

Not prerequisite, but a good companion course:
402-0871-00L Solid State Theory
402-0257-00L Advanced Solid State Physics
402-0535-00L Introduction to Magnetism