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A proper amount of excess oxygen plays a significant role in hole‐doped cuprate high‐Tc superconductivity. Here, the dopant oxygen in Bi2Sr2CaCu2O8+δ is directly imaged via integrated differential phase contrast combined with state‐of‐the‐art scanning transmission electron microscopy. The location of dopant oxygen is observed to be consistent with the position inferred from local strain analysis of...
We report the growth and characterization of atomically thick NbS2, TaS2, and FeS films on a 6H-SiC(0001) substrate terminated with monolayer or bilayer epitaxial graphene. The crystal and electronic structures are studied by scanning tunneling microscopy and reflection high-energy electron diffraction. The NbS2 monolayer is solely in the 2H structure, while the TaS2 monolayer contains both 1T and...
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