The observation of a strong nonlinear diamagnetic signal well above T_c in several cuprate superconductors constitutes clear evidence of the persistence of local superconducting correlations.
@article{arxiv.1003.5594,
title = {Fluctuation diamagnetism in high temperature superconductors},
author = {Steven A. Kivelson and Eduardo Fradkin},
journal= {arXiv preprint arXiv:1003.5594},
year = {2011}
}
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pdf file of the , vol. 3, page 15 (2010) Viewpoint article published in "Physics". Uploaded with permission from the American Physical Society. Journal-ref: Physics 3, 15 (2010)