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首页> 外文期刊>Physical review >Evidence of local superconductivity in granular Bi nanowires fabricated by electrodeposition
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Evidence of local superconductivity in granular Bi nanowires fabricated by electrodeposition

机译：电沉积法制备的颗粒状Bi纳米线中局部超导的证据

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摘要

An unusual enhancement of resistance (i.e., a "superresistivity") below a certain characteristic temperature T_(sr) was observed in granular Bi nanowires. This "superresistive" state was found to be dependent on the applied magnetic field as well as the excitation current. The suppression of T_(sr) by magnetic field resembles that of a superconductor. The observed superresistivity appears to be related to the nucleation of local superconductivity inside the granular nanowire without long-range phase coherence. The phenomenon is reminiscent of the "Cooper-pair insulator" observed previously in ultrathin two-dimensional superconducting films and three-dimensional percolative superconducting films.
机译：在颗粒状Bi纳米线中观察到低于特定特征温度T_（sr）的电阻的异常增强（即“超电阻率”）。发现这种“超电阻”状态取决于所施加的磁场以及励磁电流。磁场对T_（sr）的抑制类似于超导体的抑制。观察到的超电阻率似乎与颗粒纳米线内部局部超导的成核有关，而没有长相相干性。这种现象使人联想到先前在超薄的二维超导薄膜和三维渗流超导薄膜中观察到的“库珀对绝缘子”。

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