Comment on "Phase fluctuation superconductivity in overdoped La2-xSrxCuO4"

Details Comment on "Phase fluctuation superconductivity in overdoped La2-xSrxCuO4" Comment on "Phase fluctuation superconductivity in overdoped La2-xSrxCuO4"

2011-12-28

arxiv.org/abs/1112.6104v1

Physics

Condensed Matter

Superconductivity

4 pages, 1 figure

Scientific paper

By measuring the in-plane resistivity as a function of temperature and magnetic field in overdoped La2-xSrxCuO4 (LSCO) superconductors, in a recent Letter Rourke et al. [Nature Physics 7, 455 (2011)] have addressed the long standing but still open issue of the interplay between pseudogap and superconducting fluctuations in cuprates. Unfortunately, these authors have analyzed their interesting measurements without taking into account the unavoidable inhomogeneities of the zero-field critical temperature Tc0 associated with the random distribution of the Sr ions, in spite of the different works on this issue in the same compounds. Here we will show that such a shortcoming invalidates most of the conclusions of Rourke et al.

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