论文标题
平面石墨烯连接中的固定约瑟夫森电流的统一公式
Unified Formula for Stationary Josephson Current in Planar Graphene Junctions
论文作者
论文摘要
理论上对弹道石墨烯系统中的固定式约瑟夫森电流进行了研究，重点是平面连接，该平面连接在上面由单层石墨烯片组成，上面放置了一对超导电极。为了表征这种平面连接点，我们采用了两个参数：石墨烯片和超导电极之间的耦合强度，以及通过与电极直接接触石墨烯片中诱导的电势下降。除其他基本参数（例如温度和化学势）外，我们还考虑了这些参数，从而得出了约瑟夫森电流的一般公式。所得公式适用于广泛的参数，并在某些限制下再现了先前报道的结果。
The stationary Josephson current in a ballistic graphene system is theoretically studied with focus on a planar junction consisting of a monolayer graphene sheet on top of which a pair of superconducting electrodes is deposited. To characterize such a planar junction, we employ two parameters: the coupling strength between the graphene sheet and the superconducting electrodes, and a potential drop induced in the graphene sheet by direct contact with the electrodes. We derive a general formula for the Josephson current by taking these parameters into account in addition to other basic parameters, such as temperature and chemical potential. The resulting formula applies to a wide range of parameters and reproduces previously reported results in certain limits.
