Atomic defects impact the electronic properties of atomically thin transition metal dichalcogenides (TMDs). Here, the authors locate the mid-gap states originating from single chalcogen-atom vacancies in four representative semiconducting monolayer films, and analyse their implications for the semiconducting properties of atomically thin TMDs through electron tunneling and optical spectroscopy measurements.
- Tae Young Jeong
- Hakseong Kim
- Suyong Jung
