The mystery of superconductivity in the cuprates evinced by London penetration depths measurements

摘要

The London penetration depth plays a key role in determining and uncoveringmany properties of a superconductor, including homogeneity, anisotropy, isotopeeffects, importance of quantum and thermal fluctuations, and facets of thenature of superconductivity in a particular material. Guided by the genericphase diagram in the temperature-dopant concentration plane we examineexperimental data on the temperature, isotope substitution, inhomogeneity andmagnetic field dependence of the penetration depths to uncover some facets ofthe mystery of superconductivity in the cuprates