论文标题
扭曲双层石墨烯中的连接和超导对称性
Junctions and superconducting symmetry in twisted bilayer graphene
论文作者
论文摘要
连接提供了有关超导体顺序参数对称性的大量信息。我们分析了扫描隧道显微镜（STM）尖端与超导扭曲的双层石墨烯（TBG）和TBG Josephson连接（JJS）之间的连接。我们比较在山谷交换（S-或F-Wave）下均匀或奇怪的超导阶段。混合（S-和F-）JJ中的临界电流在很大程度上取决于连接和晶格之间的角度。在STM-TBG连接中，由于Andreev反射，F波导致子段电导的显着峰值，如实验中所见。
Junctions provide a wealth of information on the symmetry of the order parameter of superconductors. We analyze junctions between a scanning tunneling microscope (STM) tip and superconducting twisted bilayer graphene (TBG) and TBG Josephson junctions (JJs). We compare superconducting phases that are even or odd under valley exchange (s- or f-wave). The critical current in mixed (s- and f-) JJs strongly depends on the angle between the junction and the lattice. In STM-TBG junctions, due to Andreev reflection, f-wave leads to a prominent peak in subgap conductance, as seen in experiments.
