Superconducting MoSi nanowires
Superconducting MoSi nanowires
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DOI：
10.1088/1361-6668/aa954b
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发表时间：
2018-01-01
影响因子：
3.6
通讯作者：
Manninen, A. J.
中科院分区：
文献类型：
--
作者：
Lehtinen, J. S.;Kemppinen, A.;Manninen, A. J.
我们制备了无序的硅化铼超导纳米线。首先在硅的顶部沉积一个铱纳米线，然后通过快速热退火形成合金。该方法允许调节晶体生长以优化例如合金的电阻率，用于量子相位滑移（QPS）器件和超导纳米线单光子检测器中的潜在应用。导线的有效直径为42至79 nm，能够观察到从传统超导性到受热和量子波动影响的制度的交叉。在最小直径的导线中，在远低于超导临界温度的温度下，我们观察到剩余电阻和负磁阻，这可以被认为是量子点的指纹。
We have fabricated disordered superconducting nanowires of molybdenium silicide. A molybdenium nanowire is first deposited on top of silicon, and the alloy is formed by rapid thermal annealing. The method allows tuning of the crystal growth to optimize e.g. the resistivity of the alloy for potential applications in quantum phase slip (QPS) devices and superconducting nanowire single-photon detectors. The wires have effective diameters from 42 to 79 nm, enabling the observation of crossover from conventional superconductivity to regimes affected by thermal and quantum fluctuations. In the smallest diameter wire and at temperatures well below the superconducting critical temperature, we observe residual resistance and negative magnetoresistance, which can be considered as fingerprints of QPSs.