Untouched Nano-gear

我们已经证明了一个确定性的磁通棘轮的操作中的堆栈的30个本征Bi2Sr2CaCu2O8约瑟夫森结的齿轮的形状，包括20个不对称的齿。它在12 GHz驱动频率下产生明显的整流电压。由于等离子体频率可以高达数百GHz，因此超导齿轮的整流频率以及操作频率可以高达亚太赫兹范围。最近，我们还成功地制备了电子掺杂的超导薄膜Pr0.9LaCe0.1CuO4（PLCCO），并研究了它们在非接触齿轮中的应用的输运性质。所有的结果表明，所提出的非接触纳米齿轮可以实现独特的性能，但还需要更多的努力。

We have demonstrated the operation of a deterministic fluxon ratchet in a stack of 30 intrinsic Bi2Sr2CaCu2O8 Josephson junctions with the shape of a gear including 20 asymmetric teeth. It produces a pronounced rectified voltage at a 12 GHz drive frequency. As the plasma frequency can be as high as hundreds of GHz, the rectification frequencies as well as the operation frequencies of the superconducting gears can be up to sub-THz regime. Quite recently, we have also successfully fabricated electron-doped superconducting films Pr0.9LaCe0.1CuO4 (PLCCO) and investigated their transport properties for their applications in untouched gears. All the results suggest that the proposed untouched nano-gear can be realized with unique properties, though more efforts should be taken.