Hybrid superconductor-ferromagnet transistor-like device

作者：Nevirkovets I P^*; Belogolovskii M A

来源：Superconductor Science and Technology, 2011, 24(2): 024009.

DOI：10.1088/0953-2048/24/2/024009

We demonstrate theoretically and experimentally that a ferromagnetic layer as thin as a few nanometres, which is almost transparent for non-superconducting charge transport, can be used as a cut-off filter to block transport of charge-carrier superconducting correlations. This property may be exploited in some applications, as is exemplified by the case of double-barrier S(1)IS(2)FIS(3) multi-terminal devices (with S, I, and F denoting a superconductor, an insulator, and a ferromagnetic metal, respectively), whose principle of operation is based on a nonequilibrium superconducting state driven by tunnel injection of quasiparticles. Using the F layer makes the device asymmetric and considerably improves input-output isolation in comparison with the formerly investigated symmetric S(1)IS(2)IS(3) devices.

• 出版日期2011-2
• 单位西北大学