论文标题
使用2D高温超导体
Nanowire bolometer using a 2D high-temperature superconductor
论文作者
论文摘要
超导纳米线非常重要，因为它们的应用从量子技术到天文学。在这项工作中，我们实施了一个非侵入性过程，以制造高$ t_ \ text {c} $ superconductor bi $ _2 $ _2 $ sr $ _2 $ _2 $ cacu $ _2 $ _2 $ o $ $ _ {8+δ} $（BSCCO）的纳米线。我们证明，我们的纳米线可以用作可见范围内的验光仪，其响应性非常高9.7 $ \ times $ 10 $^{3} $ v/w。有趣的是，在9 nm厚度和700 nm宽度的长（30美元$ $ m）纳米线中，我们观察到最大光电压的偏置依赖电流依赖性局部斑点。此外，通过纳米线的正常状态抗性，钢计响应的可伸缩性可以通过在蜿蜒的几何形状中增加纳米线长度来进一步提高性能。我们在低温下观察到小横截面（12 nm厚，300 nm和3 $μm）的纳米线中的相位滑移事件。我们的研究提出了一种可扩展的方法，用于实现在液氮温度附近起作用的敏感强仪。
Superconducting nanowires are very important due to their applications ranging from quantum technology to astronomy. In this work, we implement a non-invasive process to fabricate nanowires of high-$T_\text{c}$ superconductor Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ (BSCCO). We demonstrate that our nanowires can be used as bolometers in the visible range with very high responsivity of 9.7 $\times$ 10$^{3}$ V/W. Interestingly, in a long (30 $μ$m) nanowire of 9 nm thickness and 700 nm width, we observe bias current-dependent localized spots of maximum photovoltage. Moreover, the scalability of the bolometer responsivity with the normal state resistance of the nanowire could allow further performance improvement by increasing the nanowire length in a meander geometry. We observe phase slip events in nanowires with small cross-sections (12 nm thick, 300 nm wide, and 3 $μ$m long) at low temperatures. Our study presents a scalable method for realizing sensitive bolometers working near the liquid-nitrogen temperature.
