1: good magnetism starting point
I have to be honest and say that I have to spend time with this book to understand everything, but I think this is one of those books that's worth the effort. AFTER a many body class this book is an appropriate way to foray into magnetism. The first thing i'd do is prove eq 2.9 and read chapters 1-3, just read (having some companion text for this 'easier' material is useful here). Once you are beyond chapter 3 you can start to calculate the results yourself. Auerbach talks about the ferro- and antiferro- magnets and different spin representations, RVBs, order and disoder, etc. There is a discussion of the NLsM and some large-N methods. I found it helpful to pull out original references at times. At the end i think you gain perspective on quantitative tools employed in magnetism, but realise also that this book is a text and therefore an introduction to the field. In that sense, i think the point here is to get some basic principle and learn various methods to go apply to new problems. I dont know any other book like it.
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