Carrier-Density Control of the SrTiO3 (001) Surface 2D Electron Gas studied by ARPES.
basic_science · Level V
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- Record sourced from PubMed, PMID 26010071.
- Also identified by DOI 10.1002/adma.201501556.
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Abstract
The origin of the 2D electron gas (2DEG)stabilized at the bare surface of SrTiO3 (001) is investigated. Using high-resolution angle-resolved photoemission and core-level spectroscopy, it is shown conclusively that this 2DEG arises from light-induced oxygen vacancies. The dominant mechanism driving vacancy formation is identified, allowing unprecedented control over the 2DEG carrier density.