Abstract
We report the investigation of the [2 0 1] surface of K0.3MoO3 ("blue bronze") in air at room temperature by scanning tunneling microscopy (STM). On a submicrometer scale a quasi-two-dimensional surface structure was found. On a subnanometer scale the chainlike crystallographic structure with single as well as with multiple defects in the unit cell could be resolved. Additionally sharp boundaries were found, separating atomically resolved regions from contrastless regions, which might be due to impurity phases in these highly anisotropic materials.
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