标题： 具有自旋轨道耦合的平面石墨烯约瑟夫森结中的当前相位关系 显示英文标题

标题： Current phase relation in a planar graphene Josephson junction with spin-orbit coupling

摘要： 我们研究了一个石墨烯约瑟夫森结，其中内部的石墨烯层通过邻近效应受到自旋轨道耦合的影响。 这可以通过例如在过渡金属双硫属化物（如WS$_2$）顶部生长石墨烯层来实现。 在这里，我们集中于弹道、宽且短的结的极限，并研究自旋轨道相互作用对超电流的影响。 特别是，我们使用基于连续模型的解析方法分析了电流相位关系。 我们发现了一些自旋轨道耦合类型组合，这些组合通过在石墨烯能带结构中打开一个间隙显著抑制了超电流。 同时，其他组合则增强了超电流，起到了有效的自旋-谷分辨化学势的作用。 此外，我们发现强Rashba自旋轨道耦合会导致具有高度可调谐谐波成分的结。 显示英文摘要

摘要： We study a graphene Josephson junction where the inner graphene layer is subjected to spin-orbit coupling by proximity effect. This could be achieved, for example, by growing the graphene layer on top of a transition metal dichalcogenide, such as WS$_2$. Here, we focus on the ballistic, wide, and short junction limits and study the effects of the spin-orbit interaction on the supercurrent. In particular, we analyze the current phase relation using an analytical approach based on the continuum model. We find combinations of types of spin-orbit coupling that significantly suppress the supercurrent by opening a gap in the graphene band structure. At the same time, other combinations enhance it, acting as an effective spin-valley resolved chemical potential. Moreover, we find that a strong Rashba spin-orbit coupling leads to a junction with a highly voltage tunable harmonic content.