Moisture-induced superconductivity in FeTe 0.8 S 0.2
Moisture-induced superconductivity in FeTe 0.8 S 0.2
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DOI：
10.1103/physrevb.81.214510
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发表时间：
2009-12
影响因子：
3.7
通讯作者：
Y. Mizuguchi;K. Deguchi;S. Tsuda;T. Yamaguchi;Y. Takano
中科院分区：
文献类型：
--
作者：
Y. Mizuguchi;K. Deguchi;S. Tsuda;T. Yamaguchi;Y. Takano
在${\text{FeTe}}_{0.8}{\text{S}}_{0.2}$中观察到水分诱导超导性。在空气中，样品的零电阻温度和超导体积分数分别提高到7.2 K和48.5%，而生长后的样品仅表现出丝状超导性。我们得出结论，超导性的演变原因是与水有关的离子和/或分子，因为只有样品在室温下在水中保存了几天才显示出超导性。将样品浸泡在热水中，可以大大加快超导性的演化速度。
Moisture-induced superconductivity was observed in ${\text{FeTe}}_{0.8}{\text{S}}_{0.2}$. With exposing the sample to the air, the zero-resistivity temperature and the superconducting volume fraction were enhanced up to 7.2 K and 48.5%, respectively, while the as-grown sample showed only filamentary superconductivity. We concluded that the causes of the evolution of superconductivity were water-related ions and/or molecules because only the sample kept in water at room temperature for several days showed superconductivity. The speed of evolution of superconductivity was strongly enhanced by immersing the sample into the hot water.