论文标题
在拓扑中大量抑制接近配对（bi $ _ {1-x} $ sb $ _ {x}）_ 2 $ te $ _3 $
Massive suppression of proximity pairing in topological (Bi$_{1-x}$Sb$_{x})_2$Te$_3$ films on niobium
论文作者
论文摘要
进行拓扑bi $ _2 $ se $ _3 $胶片与S波超导体的胶片启动在非平凡的表面状态下启动强大的超导顺序。但是，散装绝缘拓扑（bi $ _ {1-x} $ sb $ _ {x}）_ 2 $ te $ _3 $ bumk nb上的电影又显示出对表面超导性的巨大衰减，即使对于只有两层厚度的电影来说，即使是薄膜。超高分辨率频段映射可以证明这种对接近度配对的大规模抑制，并将量化的超导差距与大量N掺杂的拓扑bi $ _2 $ _2 $ se $ _3 $/nb进行了对比。结果强调了使用超导接近效应来实现几乎内在系统中的拓扑超导性的局限性。
Interfacing bulk conducting topological Bi$_2$Se$_3$ films with s-wave superconductors initiates strong superconducting order in the nontrivial surface states. However, bulk insulating topological (Bi$_{1-x}$Sb$_{x})_2$Te$_3$ films on bulk Nb instead exhibit a giant attenuation of surface superconductivity, even for films only two-layers thick. This massive suppression of proximity pairing is evidenced by ultrahigh-resolution band mappings and by contrasting quantified superconducting gaps with those of heavily n-doped topological Bi$_2$Se$_3$/Nb. The results underscore the limitations of using superconducting proximity effects to realize topological superconductivity in nearly intrinsic systems.
