论文标题
电子相互作用和双层石墨烯中的自旋轨道增强的超导性
Superconductivity from electronic interactions and spin-orbit enhancement in bilayer and trilayer graphene
论文作者
论文摘要
我们讨论了一种类似Kohn-Luttinger的机制，用于Bernal双层石墨烯和菱形三层石墨烯中的超导性。在连续模型描述中工作时，我们发现仅筛选的远程库仑相互作用就会与与实验一致的临界温度产生超导性。我们观察到阶数参数会改变山谷之间的符号，这意味着两种材料都是山谷 - 旋转式旋转 - 三个超导体。添加ISIN自旋轨道耦合会导致临界温度的显着增强，也与实验一致，超导顺序参数显示自旋和山谷自由度之间的锁定。
We discuss a Kohn-Luttinger-like mechanism for superconductivity in Bernal bilayer graphene and rhombohedral trilayer graphene. Working within the continuum model description, we find that the screened long-range Coulomb interaction alone gives rise to superconductivity with critical temperatures that agree with experiments. We observe that the order parameter changes sign between valleys, which implies that both materials are valley-singlet, spin-triplet superconductors. Adding Ising spin-orbit coupling leads to a significant enhancement in the critical temperature, also in line with experiment, and the superconducting order parameter shows locking between the spin and valley degrees of freedom.
