论文标题
能量分配控制的弹道约瑟夫森连接
Energy distribution controlled ballistic Josephson junction
论文作者
论文摘要
我们报告了一项关于基于弹道石墨烯的Josephson结中超电流调整的实验研究，通过将对照电压应用于横向正常通道。在这个四末端的几何形状中，控制电压改变了约瑟夫森交界处的安德里夫州的职业，从而调整了超电流的大小。作为栅极电压的函数，我们发现了两个不同的机制，其特征分别为双步分布和热电子分布。我们的工作为设计高度可控的Josephson连接开设了新的机会，用于可调超导量子电路。
We report an experimental study on the tuning of supercurrent in a ballistic graphene-based Josephson junction by applying a control voltage to a transverse normal channel. In this four-terminal geometry, the control voltage changes the occupation of Andreev states in the Josephson junction, thereby tuning the magnitude of the supercurrent. As a function of gate voltage, we find two different regimes characterized by a double-step distribution and a hot-electron distribution, respectively. Our work opens new opportunities to design highly controllable Josephson junctions for tunable superconducting quantum circuits.
