This lecture discusses itinerant magnetism, focusing on the spin density wave phenomenon. Topics include the Stoner criterion with q-dependence, charge-density waves, Kohn anomaly, and collective excitations in different dimensions.
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The lectures will provide an introduction to magnetism in materials, covering fundamentals of spin and orbital degrees of freedom, interactions between moments and some typical ordering patterns. Sele
Covers elastic scattering of fast electrons and their interactions with matter, including the derivation of the Mott formula and effective refractive index.