Journal
ADVANCED MATERIALS
Volume 27, Issue 26, Pages 3894-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201501556
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Funding
- Swiss National Science Foundation [200021-146995]
- UK-EPSRC [EP/I031014/1]
- Royal Society
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan [24224009]
- Swiss National Science Foundation (SNF) [200021_146995] Funding Source: Swiss National Science Foundation (SNF)
- EPSRC [EP/I031014/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/I031014/1] Funding Source: researchfish
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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.
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