Depairing field, onset temperature and the nature of the transition in cuprates
Abstract
The depairing (upper critical) field Hc2 in hole-doped cuprates has been inferred from magnetization curves M-H measured by torque magnetometry in fields H up to 45 T. We discuss the implications of the results for the pair binding energy, the Nernst onset temperature, fluctuations and the nature of the Meissner transition at Tc.
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