标题： 无光照射/有光照射下通过节点面半金属-超导体结的输运 显示英文标题

标题： Transport through Nodal Surface Semimetal-Superconductor junction in absence/presence of light irradiation

摘要： 我们研究通过s波超导体(SC)结的量子隧穿效应，该结具有拓扑电荷的节点表面半导体(NSSM)，其中非对称对称性迫使节点表面紧贴布里渊区边界。 由于它们在二维能带交叉附近的独特色散特性，NSSM中的载流子在SC结界面处表现出许多非常规的Andreev以及正常反射行为。 我们研究了不同入射方向下亚能隙和超能隙能量下的这些行为，通常不遵循反射率随入射能量或入射角单调衰减/增加的规律。 我们还考虑了在高频率辐射极限下，通过圆偏振和线偏振光照射此类系统，并采用弗洛凯方法，探测传输参数的闪烁时间演化。 我们的结果表明了许多非平凡的Andreev输运特性，包括亚能隙电导的近似耗尽。 所有这些非平凡性都可以在冷原子设置的光晶格中进行测试，并且可以很好地用于量子信息处理实验。 显示英文摘要

摘要： We study quantum tunnelling via s-wave superconductor (SC) junction with a topologically charged nodal surface semimetal (NSSM) where a nonsymmorphic symmetry forces the nodal surfaces to stick to the Brillouin Zone boundary. Due to their unique dispersions close to the two dimensional band crossing, the charge carriers in the NSSM display many unorthodox behavior in the nature of Andreev as well as normal reflections at the SC junction interface. We investigate such behaviors for different incident orientations for both subgap and supergap energies where monotonic decays/rises of reflectance with incident energy or angle of incidences are often not followed. We also consider irradiation via light with circular and linear polarization on such systems following a Floquet approach in the limit of high frequency irradiation and probe the stroboscopic temporal evolution of the transport parameters. Our results indicate many nontrivial Andreev transport features including near-depletion of the subgap conductivities. All these nontrivialities can be tested in a cold atom set-up on optical lattices and well experimented for quantum information processing purpose.