Atomic-scale structures and electronic states of defects on Ar+-ion irradiated MoS2

► MoS2 surfaces bearing defects generated by Ar+ bombardment at a low density were observed by STM. ► STS results revealed that the two types of defects have different spectra. ► The bright feature is assigned to hybridized Mo states beneath the feature. ► The concave defect is monolayer removal of MoS2 with the mid-gap electronic state at the edge.