The dynamics of ultraviolet-induced oxygen vacancy at the surface of insulating SrTiO3(001)

S Suwanwong; T Eknapakul; Y Rattanachai; C Masingboon; S Rattanasuporn; R Pattanakun; H Nakajima; Phil King; S K Hodak; Worawat Meevasana

doi:10.1016/j.apsusc.2015.06.171

The dynamics of ultraviolet-induced oxygen vacancy at the surface of insulating SrTiO₃(001)

S Suwanwong, T Eknapakul, Y Rattanachai, C Masingboon, S Rattanasuporn, R Pattanakun, H Nakajima, Phil King, S K Hodak, Worawat Meevasana

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

Abstract

The effect of ultra-violet (UV) irradiation on the electronic structure and the surface resistance of an insulating SrTiO₃(001) crystal is studied in this work. Upon UV irradiation, we shows that the two-dimensional electron gas (2DEG) emerges at the insulating SrTiO₃ surface and there is a pronounced change in the surface resistance. By combining the observations of the change in valance band and the resistance change under different environments of gas pressure and gas species, we find that UV-induced oxygen vacancies at the surface plays a major role in the resistance change. The dynamic of the resistance change at different oxygen pressures also suggests an alternative method of low-pressure sensing.

Original language	English
Pages (from-to)	210-212
Journal	Applied Surface Science
Volume	355
Early online date	14 Jul 2015
DOIs	https://doi.org/10.1016/j.apsusc.2015.06.171
Publication status	Published - 15 Nov 2015

Keywords

Strontium titanate
SrTiO3
UV irradiation
Pressure sensing
Electronic structure
ARPES

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10.1016/j.apsusc.2015.06.171

King_2015_SurfaceScience_Dynamics_AM
Copyright © 2015 Elsevier B.V. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org10.1016/j.apsusc.2015.06.171
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Cite this

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title = "The dynamics of ultraviolet-induced oxygen vacancy at the surface of insulating SrTiO3(001)",

abstract = "The effect of ultra-violet (UV) irradiation on the electronic structure and the surface resistance of an insulating SrTiO3(001) crystal is studied in this work. Upon UV irradiation, we shows that the two-dimensional electron gas (2DEG) emerges at the insulating SrTiO3 surface and there is a pronounced change in the surface resistance. By combining the observations of the change in valance band and the resistance change under different environments of gas pressure and gas species, we find that UV-induced oxygen vacancies at the surface plays a major role in the resistance change. The dynamic of the resistance change at different oxygen pressures also suggests an alternative method of low-pressure sensing.",

keywords = "Strontium titanate, SrTiO3, UV irradiation, Pressure sensing, Electronic structure, ARPES",

author = "S Suwanwong and T Eknapakul and Y Rattanachai and C Masingboon and S Rattanasuporn and R Pattanakun and H Nakajima and Phil King and Hodak, \{S K\} and Worawat Meevasana",

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AU - Suwanwong, S

AU - Eknapakul, T

AU - Rattanachai, Y

AU - Masingboon, C

AU - Rattanasuporn, S

AU - Pattanakun, R

AU - Nakajima, H

AU - King, Phil

AU - Hodak, S K

AU - Meevasana, Worawat

PY - 2015/11/15

Y1 - 2015/11/15

N2 - The effect of ultra-violet (UV) irradiation on the electronic structure and the surface resistance of an insulating SrTiO3(001) crystal is studied in this work. Upon UV irradiation, we shows that the two-dimensional electron gas (2DEG) emerges at the insulating SrTiO3 surface and there is a pronounced change in the surface resistance. By combining the observations of the change in valance band and the resistance change under different environments of gas pressure and gas species, we find that UV-induced oxygen vacancies at the surface plays a major role in the resistance change. The dynamic of the resistance change at different oxygen pressures also suggests an alternative method of low-pressure sensing.

AB - The effect of ultra-violet (UV) irradiation on the electronic structure and the surface resistance of an insulating SrTiO3(001) crystal is studied in this work. Upon UV irradiation, we shows that the two-dimensional electron gas (2DEG) emerges at the insulating SrTiO3 surface and there is a pronounced change in the surface resistance. By combining the observations of the change in valance band and the resistance change under different environments of gas pressure and gas species, we find that UV-induced oxygen vacancies at the surface plays a major role in the resistance change. The dynamic of the resistance change at different oxygen pressures also suggests an alternative method of low-pressure sensing.

KW - Strontium titanate

KW - SrTiO3

KW - UV irradiation

KW - Pressure sensing

KW - Electronic structure

KW - ARPES

UR - https://www.scopus.com/pages/publications/84944315200

U2 - 10.1016/j.apsusc.2015.06.171

DO - 10.1016/j.apsusc.2015.06.171

M3 - Article

SN - 0169-4332

VL - 355

SP - 210

EP - 212

JO - Applied Surface Science

JF - Applied Surface Science

ER -

The dynamics of ultraviolet-induced oxygen vacancy at the surface of insulating SrTiO₃(001)

Abstract

Keywords

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