Why KT phase transition is considered different from a second order phase transition?

  • Thread starter wdlang
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  • #1
wdlang
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i cannot see the reason

what makes KT phase transition different from the ferro-para phase transition of the 2D ising model?
 

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  • #2
atyy
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There is no local order parameter in the KT transition, so it's "topological" rather than "symmetry breaking".

http://www.itp.uzh.ch/~llucas/projects/proseminar.pdf [Broken]
http://www.phy.cuhk.edu.hk/course/2011-2012/1/phys5510/download/0/Ch11%20KT%20transition.pdf [Broken]
http://www.mit.edu/~levitov/8.334/notes/XYnotes1.pdf
 
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