Experimental investigation of hybrid single-electron turnstiles with high charging energy
Experimental investigation of hybrid single-electron turnstiles with high charging energy
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DOI：
10.1063/1.3127229
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发表时间：
2009-04-27
影响因子：
4
通讯作者：
Pekola, J. P.
中科院分区：
文献类型：
--
作者：
Kemppinen, A.;Kafanov, S.;Pekola, J. P.
我们提出了一个实验研究的混合旋转栅门与超导间隙相比，具有高充电能量。该器件采用序贯隧穿近似模型。示出的背隧效应，以限制栅极驱动的幅度，从而最大泵浦电流的旋转栅门。我们比较了正弦波和方波驱动的结果，并展示了快速上升时间如何抑制漏电流引起的误差。量化电流平台高达160 pA的证明。
We present an experimental study of hybrid turnstiles with high charging energies in comparison to the superconducting gap. The device is modeled with the sequential tunneling approximation. The backtunneling effect is shown to limit the amplitude of the gate drive and thereby the maximum pumped current of the turnstile. We compare results obtained with sine and square wave drive and show how a fast rise time can suppress errors due to leakage current. Quantized current plateaus up to 160 pA are demonstrated.