Experimental limits of the observation of thermally activated phase-slip mechanism in superconducting nanowires
Experimental limits of the observation of thermally activated phase-slip mechanism in superconducting nanowires
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DOI：
10.1103/physrevb.75.172509
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发表时间：
2007-05
影响因子：
3.7
通讯作者：
M. Zgirski;K. Arutyunov
中科院分区：
文献类型：
--
作者：
M. Zgirski;K. Arutyunov
分析了实验观察到的超导细线的$R（T）$转变的形状。从理论上讲，准一维超导沟道中的相变展宽与相滑移机制有关。结果表明，这种解释可能是误导，如果考虑几何不均匀性和有限尺寸的真实的样品在实验中研究。该分析基于实验事实，即对于许多超导材料，临界温度取决于样品的特征尺寸：薄膜厚度或导线横截面。
The shape of experimentally observed $R(T)$ transition of thin superconducting wires is analyzed. From theoretical point of view, broadening of the transition in quasi-one-dimensional superconducting channels is typically associated with phase-slip mechanism. It is shown that such interpretation can be misleading if to consider geometrical inhomogeneity and finite dimensions of real samples studied in experiments. The analysis is based on experimental fact that for many superconducting materials the critical temperature depends on the characteristic dimension of a sample: film thickness or wire cross section.