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Carrier‐Density Control of the SrTiO 3 (001) Surface 2D Electron Gas studied by ARPES
Author(s) -
Walker Siobhan McKeown,
Bruno Flavio Yair,
Wang Zhiming,
de la Torre Alberto,
Riccó Sara,
Tamai Anna,
Kim Timur K.,
Hoesch Moritz,
Shi Ming,
Bahramy Mohammad Saeed,
King Phil D. C.,
Baumberger Felix
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201501556
Subject(s) - angle resolved photoemission spectroscopy , materials science , photoemission spectroscopy , fermi gas , electron , x ray photoelectron spectroscopy , condensed matter physics , oxygen , inverse photoemission spectroscopy , surface (topology) , spectroscopy , electronic structure , nuclear magnetic resonance , physics , geometry , mathematics , quantum mechanics
The origin of the 2D electron gas (2DEG)stabilized at the bare surface of SrTiO 3 (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.