Fluxoid quantization effects in superconducting mesoscopic Al multiloop structures

Fluxoid quantization effects in superconducting mesoscopic Al multiloop structures
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超导介观铝多环结构中的通量量子化效应

DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
Y. Bruynseraede
Y. Bruynseraede
中科院分区：
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文献类型：
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作者：
V. Bruyndoncx;C. Strunk;V. Moshchalkov;C. Haesendonck;Y. Bruynseraede

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我们研究了由少量方环组成的介观Al样品中的磁通量子化效应。在短的微梯中发现了Little-Parks振荡（即临界温度Tc随外加磁通量Φ的振荡）的一个明显的子结构，Tc（Φ）中的这些新特征源于不同量子态之间的跃迁，每个量子态具有特定的序参量分布和超电流的流动模式。实验数据与de Gennes-Alexander模型计算的超导微网的Tc（Φ）非常吻合。
We have studied fluxoid quantization effects in mesoscopic Al samples consisting of a small number of square loops. In short microladders a pronounced substructure of the Little-Parks oscillations (i.e. the oscillations of the critical temperature Tc as a function of the applied magnetic flux Φ) has been found. These new features in Tc(Φ) originate from transitions between different quantum states, each having a specific order parameter profile and flow pattern of the supercurrents. The experimental data are in excellent agreement with the Tc(Φ) calculated within the de Gennes-Alexander model for superconducting micronetworks.