Contrary to the starting assumption of Grbić et al. [Phys. Rev. B 83, 144508 (2011)], here we will argue that a 16-T magnetic field is not enough to quench all superconducting fluctuations above $T_c$ in ${\mathrm{YBa}}_2{\mathrm{Cu}}_3{\mathrm{O}}_{7-\delta }$. We conclude that through their measurements of microwave absorption these authors actually determine the AC fluctuation magnetoconductivity at 16 T, instead of the zero-field AC paraconductivity as they contend. So the temperature proposed by Grbić et al. for the onset of the superconducting fluctuations, $T^{\prime }$, will correspond to the one at which the finite-field effects at 16 T become measurable in their experiments and the actual fluctuation onset will be located well above $T^{\prime }$. These conclusions, which also concern influential recent publications on that issue, are confirmed by analyzing some of the Grbić et al. data on the grounds of the Gaussian Ginzburg-Landau approach for the finite-field (or Prange) fluctuation regime.

中文翻译：

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评论“TcinYBa2Cu3O7-δ单晶以上的超导涨落的温度范围”

与Grbić等人的初始假设相反。[物理 版本B 83，144508（2011）]，在这里我们会说，一个16-T的磁场是不够的淬火高于一切超导波动${Ť}_C$ 在 ${\mathrm{Ba}}_2{铜}_3{\mathrm{Ø}}_{7-\delta }$。我们得出的结论是，通过他们对微波吸收的测量，这些作者实际上确定了16 T时的AC波动磁导率，而不是他们所主张的零场AC超导率。因此，Grbić等人提出的温度。对于超导波动的发生，${Ť}^{\prime }$，将对应于在实验中可测量16 T时的有限场效应的位置，而实际的波动起始点将位于 ${Ť}^{\prime }$。通过分析一些Grbić等人的观点，这些结论也涉及到有关该问题的最新出版物。有限域（或Prange）波动机制的高斯Ginzburg-Landau方法为基础的数据。