Comment on "History Effects and Phase Diagram near the Lower Critical Point in YBa2Cu3O7-δ Single Crystals"
Ryusuke Ikeda
Abstract
This is a Comment on an experimental paper by Zhukov et al. on the issue of a lower critical point, seen only in YBCO clean samples, of the first order transition line implying a vortex liquid-freezing. An explanation with a firm theoretical basis of the strange doping dependence of the lower critical point is presented.
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