On the occurrence of Kosterlitz-Thouless behavior in cuprate superconductors
Abstract
The observation of the characteristic Kosterlitz-Thouless behavior requires the attaintment of the two dimensional limit where the correlation-length anisotropy, gamma=gsiab/gsic, diverges. Our findings strongly suggest that the failure of several experiments on films and single crystals to observe any trace of KT-behavior is attributable either to inhomogeneities or doping by means of chemical substitution.
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