%%Extensive discription of Drude model found in chapter 1 of Ashcroft and Mermin, brief discussion of it around pg 22 of the book by Datta on mesoscopic physics.%% %%This topic should really go in a new index on electromagnetism in media and thsi index on electromagnetism in media should be linked to on the section on solid state physics.%% %%Is the Drude model the only main model of solids? what about others?%% # Drude peaks # Deviations from the Drude model At low temperatures and high magnetic fields, deviations from the Drude model become much more measureable. %%There needs to be an entry at some point summarizing all devations from the Drude model - what broad models are there?%% #Electromagnetism