Carrier-density control of the SrTiO3 (001) surface 2DEG studied by ARPES
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.
Citation
McKeown Walker , S E , Bruno , F Y , Wang , Z , de la Torre , A , Riccó , S , Tamai , A , Kim , T , Hoesch , M , Shi , M , Bahramy , M S , King , P & Baumberger , F 2015 , ' Carrier-density control of the SrTiO 3 (001) surface 2DEG studied by ARPES ' Advanced Materials , vol. 27 , no. 26 , 27 , pp. 3894-3899 . DOI: 10.1002/adma.201501556
Publication
Advanced Materials
Status
Peer reviewed
ISSN
0935-9648Type
Journal article
Rights
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the peer reviewed version of the following article: Walker, S. M., Bruno, F. Y., Wang, Z., de la Torre, A., Riccó, S., Tamai, A., Kim, T. K., Hoesch, M., Shi, M., Bahramy, M. S., King, P. D. C. and Baumberger, F. (2015), Carrier-Density Control of the SrTiO3 (001) Surface 2D Electron Gas studied by ARPES. Adv. Mater., 27: 3894–3899, which has been published in final form at https://dx.doi.org/10.1002/adma.201501556. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Description
This work was supported by the Swiss National Science Foundation (200021-146995). P. D. C. K was supported by the UK-EPSRC (EP/I031014/1) and the Royal Society. M. S. B was supported by Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology of Japan.Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.