Specific Heat of Zn-Doped YBa2Cu3O6.95: Possible Evidence for Kondo Screening in the Superconducting State
D. L. Sisson, S. G. Doettinger, A. Kapitulnik, R. Liang, D. A. Bonn, W. N. Hardy
Abstract
The magnetic field dependence of the specific heat of Zn-doped single crystals of YBa2Cu3O6.95 was measured between 2 and 10 K and up to 8 Tesla. Doping levels of 0, 0.15%, 0.31%, and 1% were studied and compared. In particular we searched for the Schottky anomaly associated with the Zn-induced magnetic moments.
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