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Depairing field, onset temperature and the nature of the transition in cuprates

Lu Li, Yayu Wang, J. G. Checkelsky, M. J. Naughton, Seiki Komiya, Shimpei Ono, Yoichi Ando, N. P. Ong

cond-mat.supr-conarXiv:cond-mat/0610714

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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