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Carrier-Density Control of the SrTiO3 (001) Surface 2D Electron Gas studied by ARPES

ContributorsMckeown Walker, Siobhan; Bruno, Flavio Yair; Wang, Zhiming; De La Torre, Alberto; Ricco, Sara; Tamai, Annaorcid; Kim, Timur K.; Hoesch, Moritz; Shi, Ming; Bahramy, Mohammad Saeed; King, Phil D. C.; Baumberger, Felixorcid
Published inAdvanced materials, vol. 27, no. 26, p. 3894-3899
Publication date2015
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.

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MCKEOWN WALKER, Siobhan et al. Carrier-Density Control of the SrTiO3 (001) Surface 2D Electron Gas studied by ARPES. In: Advanced materials, 2015, vol. 27, n° 26, p. 3894–3899. doi: 10.1002/adma.201501556
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Journal ISSN0935-9648
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