Evidence of Cooper-pair pumping with combined flux and voltage control
Evidence of Cooper-pair pumping with combined flux and voltage control
复制标题
结合通量和电压控制的库珀对泵浦的证据
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
J. Pekola
中科院分区：
文献类型：
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作者：
A. Niskanen;A. Niskanen;J. Kivioja;H. Seppä;J. Pekola
我们在实验上演示了库珀对在单岛介观结构中的泵浦。该岛通过超导量子干涉装置(SQUID)环路连接到导线。施加同步的磁通和电压信号，从而绝热地调谐SQUID和栅电荷的约瑟夫森能量。从电流-电压特性可以看出，泵浦电流在测量时间尺度上以1e步长增加，这是由于准粒子中毒引起的，但我们认为电荷的输运是由库珀对引起的。
We have experimentally demonstrated pumping of Cooper pairs in a single-island mesoscopic structure. The island was connected to leads through SQUID (Superconducting Quantum Interference Device) loops. Synchronized flux and voltage signals were applied whereby the Josephson energies of the SQUIDs and the gate charge were tuned adiabatically. From the current-voltage characteristics one can see that the pumped current increases in 1e steps which is due to quasiparticle poisoning on the measurement time scale, but we argue that the transport of charge is due to Cooper pairs.