论文标题
无现场石墨烯中的非转向超级流
Non-Reciprocal Supercurrents in a Field-Free Graphene Josephson Triode
论文作者
论文摘要
超导二极管是提出的非转向电路元件，应在一个方向上表现出非隔离性转运，同时在相反方向上具有电阻。在过去的几年中，这种设备的多个示例已经出现，但是它们的效率通常受到限制，其中大多数需要磁场才能运行。在这里，我们提出了一种在零字段运行时达到90％以上效率的设备。我们的样本由一个由三个石墨烯约瑟夫森连接的网络组成，该连接由一个通用的超导岛连接，我们将其称为约瑟夫森三极管。通过将控件电流应用于其中一个触点，从而打破了电流流的时间反转对称性来调节三极管。通过纠正施加的小（Na振幅）施加的方波，证明了三极管的效用。我们推测，这种类型的设备可以在现代量子电路中实际使用。
Superconducting diodes are proposed non-reciprocal circuit elements that should exhibit non-dissipative transport in one direction while being resistive in the opposite direction. Multiple examples of such devices have emerged in the past couple of years, however their efficiency is typically limited, and most of them require magnetic field to function. Here we present a device achieving efficiencies upwards of 90% while operating at zero field. Our samples consist of a network of three graphene Josephson junctions linked by a common superconducting island, to which we refer as a Josephson triode. The triode is tuned by applying a control current to one of the contacts, thereby breaking the time-reversal symmetry of the current flow. The triode's utility is demonstrated by rectifying a small (tens of nA amplitude) applied square wave. We speculate that devices of this type could be realistically employed in the modern quantum circuits.
