Carrier-density control of the SrTiO3 (001) surface 2DEG studied by ARPES

Siobhan Ellen McKeown Walker; Flavio Y Bruno; Zhiming Wang; Alberto de la Torre; Sara Riccó; Anna Tamai; Timur Kim; Moritz Hoesch; Ming Shi; Mohammed Saeed Bahramy; Phil King; Felix Baumberger

doi:10.1002/adma.201501556

Carrier-density control of the SrTiO₃ (001) surface 2DEG studied by ARPES

Siobhan Ellen McKeown Walker
, Flavio Y Bruno
, Zhiming Wang
, Alberto de la Torre
, Sara Riccó
, Anna Tamai
, Timur Kim
, Moritz Hoesch
, Ming Shi
, Mohammed Saeed Bahramy
, Phil King
, Felix Baumberger

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	27
Pages (from-to)	3894-3899
Journal	Advanced Materials
Volume	27
Issue number	26
Early online date	22 May 2015
DOIs	https://doi.org/10.1002/adma.201501556
Publication status	Published - 2015

Keywords

Strontium titanate
Angle resolved photoemission spectroscopy
Two-dimensional electron gas
Oxygen vacancies

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10.1002/adma.201501556

AM_McKeownWalker
© 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.
Accepted author manuscript, 2.58 MB

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@article{7f3e1aec79c44578b267de61a8246f94,

title = "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.",

keywords = "Strontium titanate, Angle resolved photoemission spectroscopy, Two-dimensional electron gas, Oxygen vacancies",

author = "\{McKeown Walker\}, \{Siobhan Ellen\} and Bruno, \{Flavio Y\} and Zhiming Wang and \{de la Torre\}, Alberto and Sara Ricc{\'o} and Anna Tamai and Timur Kim and Moritz Hoesch and Ming Shi and Bahramy, \{Mohammed Saeed\} and Phil King and Felix Baumberger",

note = "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. ",

year = "2015",

doi = "10.1002/adma.201501556",

language = "English",

volume = "27",

pages = "3894--3899",

journal = "Advanced Materials",

issn = "0935-9648",

publisher = "Wiley-Blackwell",

number = "26",

}

TY - JOUR

T1 - Carrier-density control of the SrTiO3 (001) surface 2DEG studied by ARPES

AU - McKeown Walker, Siobhan Ellen

AU - Bruno, Flavio Y

AU - Wang, Zhiming

AU - de la Torre, Alberto

AU - Riccó, Sara

AU - Tamai, Anna

AU - Kim, Timur

AU - Hoesch, Moritz

AU - Shi, Ming

AU - Bahramy, Mohammed Saeed

AU - King, Phil

AU - Baumberger, Felix

N1 - 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.

PY - 2015

Y1 - 2015

N2 - 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.

AB - 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.

KW - Strontium titanate

KW - Angle resolved photoemission spectroscopy

KW - Two-dimensional electron gas

KW - Oxygen vacancies

UR - http://onlinelibrary.wiley.com/doi/10.1002/adma.201501556/full#footer-support-info

U2 - 10.1002/adma.201501556

DO - 10.1002/adma.201501556

M3 - Article

SN - 0935-9648

VL - 27

SP - 3894

EP - 3899

JO - Advanced Materials

JF - Advanced Materials

IS - 26

M1 - 27

ER -

Carrier-density control of the SrTiO₃ (001) surface 2DEG studied by ARPES

Abstract

Keywords

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Royal Society Research Fellowship: Electronic structure engineering of novel topological phases

Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems

Underpinning data : Carrier Density Control of the SrTiO3 (001) surface 2DEG studied by ARPES

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Carrier-density control of the SrTiO3 (001) surface 2DEG studied by ARPES

Abstract

Keywords

Access to Document

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Projects

Royal Society Research Fellowship: Electronic structure engineering of novel topological phases

Topological Protection and NonEquilibriu: Topological Protection and NonEquilibrium States in Strongly Correlated Electron Systems

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Underpinning data : Carrier Density Control of the SrTiO3 (001) surface 2DEG studied by ARPES

Cite this

Carrier-density control of the SrTiO₃ (001) surface 2DEG studied by ARPES