Magnetic Fingerprints in Superconducting Au$_{0.7}$In$_{0.3}$ Cylinders
Magnetic Fingerprints in Superconducting Au$_{0.7}$In$_{0.3}$ Cylinders
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超导 Au$_{0.7}$In$_{0.3}$ 圆柱体中的磁性指纹
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
Y. Liu
中科院分区：
文献类型：
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作者：
Yu. Zadorozhny;D. R. Herman;Y. Liu
在亚微米直径的空心Au $0.7}$In $0.3}$圆柱体的超导转变区的低温部分观察到了可再现的、样品特有的磁阻波动（磁指纹）。波动的幅度被发现超过了几个数量级的正常金属的普遍电导波动。这些观测结果的物理起源与超导序参量的介观涨落有关。
Reproducible, sample-specific magnetoresistance fluctuations (magnetic fingerprints) were observed in the low-temperature part of the superconducting transition regime of hollow Au$_{0.7}$In$_{0.3}$ cylinders of submicron diameter. The amplitude of the fluctuations was found to exceed that of the universal conductance fluctuation in normal metals by several orders of magnitude. The physical origin of these observations is related to mesoscopic fluctuations of the superconducting order parameter.