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Upper Critical Field of Granular SnGe Samples Near the Superconductor-to-Insulator Transition
並列摘要
We have measured the upper critical field, Hc2(T ), in granular SnGe samples with normal state resistivities, ρN, that range from 0.3 mΩ cm to 0.5 Ω cm. The samples demonstrate an evolution from superconducting to insulating in transport with increasing disorder. The temperature dependence of Hc2 shows a clear change in curvature between high ρN and intermediate ρN samples differing from the experimental results by Deutscher et al.. Our data is analyzed in terms of Ginzburg-Landau theory and grain structure induced disorder effect. The result is similar to the observation in high Tc superconductors that anisotropy induced fluctuation effect play an important role.
並列關鍵字
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Chang, H. C. (2010). 階層式微顯影光源光罩最佳化演算法使用Abbe-PCA [master's thesis, National Taiwan University]. Airiti Library. https://doi.org/10.6342/NTU.2010.01501
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