Title: Gauge dependence of the critical dynamics at the superconducting phase transition
Author(s):

	M.Dudka (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 79011 Lviv, Ukraine; Institut für Theoretische Physik, Johannes Kepler Universität Linz, A-4040 Linz, Austria) ,
	R.Folk (Institut für Theoretische Physik, Johannes Kepler Universität Linz, A-4040 Linz, Austria) ,
	G.Moser (Institut für Physik und Biophysik, Universität Salzburg, A-5020 Salzburg, Austria)

The critical dynamics of superconductors in the charged regime is reconsidered within field-theory. For the dynamics, the Ginzburg-Landau model with complex order parameter coupled to the gauge field suggested earlier [Lannert et al. Phys. Rev. Lett. 92, 097004 (2004)] is used. Assuming relaxational dynamics for both quantities, the renormalization group functions within one loop approximation are recalculated for different choices of the gauge. A gauge independent result for the divergence of the melectric conductivity is obtained only at the weak scaling fixed point unstable in one loop order where the timescales of the order parameter and the gauge field are different.

Key words: critical dynamics, superconducting transition
PACS: 05.70.Jk, 64.60.Ak, 64.60.Ht, 74.20.-z

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