New Universality Class in the Superconductive Phase Transition
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The superconductive phase transition in the Ginzburg-Landau theory (or Coulomb-Higgs phase transition of scalar QED in 3D) is discussed in a dual formulation which focuses on the magnetic rather than the electric excitations of the system. Renormalization group analysis of the dual formulation reveals the transition to be of second order and of a new universality class. Whereas coherence length and specific heat have XY-model exponents, the magnetic penetration depth shows mean-field behavior. Experimental evidence for these predictions is discussed.
Invited talk presented by A. Schakel at the 10'th International Conference on Problems of Quantum Field Theory, Alushta, Ukraine, May 13-17, 1996. Author Information under http://www.physik.fu-berlin.de/~kleinert/institution.html; HTML version and PostScript version of paper available at http://www.physik.fu-berlin.de/~kleinert/kleiner_re247/preprint.html
Invited talk presented by A. Schakel at the 10'th International Conference on Problems of Quantum Field Theory, Alushta, Ukraine, May 13-17, 1996. Author Information under http://www.physik.fu-berlin.de/~kleinert/institution.html; HTML version and PostScript version of paper available at http://www.physik.fu-berlin.de/~kleinert/kleiner_re247/preprint.html