Skip to content

Research at St Andrews

Distinct behaviour of localized and delocalized carriers in anatase TiO2 (001) during reaction with O2

Research output: Contribution to journalArticlepeer-review

Author(s)

C Bigi, Z Tang, G Pierantozzi, P Orgiani, P Das, J Fujii, I Vobornik, T Pincelli, A Troglia, T Lee, R Ciancio, G Drazic, A Verdini, A Regoutz, Phil King, Deepnarayan Biswas, G Rossi, G Panaccione, A Selloni

School/Research organisations

Abstract

Two-dimensional (2D) metallic states induced by oxygen vacancies (VOs) at oxide surfaces and interfaces provide opportunities for the development of advanced applications, but the ability to control the behavior of these states is still limited. We used angle resolved photoelectron spectroscopy combined with density-functional theory (DFT) to study the reactivity of VO-induced states at the (001) surface of anatase TiO2, where both 2D metallic and deeper lying in-gap states (IGs) are observed. The 2D and IG states exhibit remarkably different evolutions when the surface is exposed to molecular O2: while IGs are almost completely quenched, the metallic states are only weakly affected. DFT calculations indeed show that the IGs originate from surface VOs and remain localized at the surface, where they can promptly react with O2. In contrast, the metallic states originate from subsurface vacancies whose migration to the surface for recombination with O2 is kinetically hindered on anatase TiO2 (001), thus making them much less sensitive to oxygen dosing.
Close

Details

Original languageEnglish
Article number025801
Number of pages9
JournalPhysical Review Materials
Volume4
Issue number2
DOIs
Publication statusPublished - 28 Feb 2020

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. Angle, spin, and depth resolved photoelectron spectroscopy on quantum materials

    King, P. D. C., Picozzi, S., Egdell, R. & Panaccione, G., 21 Dec 2020, In: Chemical Reviews. Articles ASAP, 41 p.

    Research output: Contribution to journalReview articlepeer-review

  2. Changes of Fermi surface topology due to the rhombohedral distortion in SnTe

    O'Neill, C. D., Clark, O. J., Keen, H. D. J., Mazzola, F., Marković, I., Sokolov, D. A., Malekos, A., King, P. D. C., Hermann, A. & Huxley, A. D., 21 Oct 2020, In: Physical Review. B, Condensed matter and materials physics. 102, 5, 155132.

    Research output: Contribution to journalArticlepeer-review

  3. Strong-coupling charge density wave in monolayer TiSe2

    Watson, M. D., Rajan, A., Antonelli, T., Underwood, K., Marković, I., Mazzola, F., Clark, O. J., Siemann, G-R., Biswas, D., Hunter, A., Jandura, S., Reichstetter, J., Mclaren, M., Le Fèvre, P., Vinai, G. & King, P. D. C., 12 Oct 2020, In: 2D Materials. 8, 1, 015004.

    Research output: Contribution to journalArticlepeer-review

  4. Surface and bulk electronic structure of aluminium diboride

    Sunko, V., Milosavljević, D., Mazzola, F., Clark, O. J., Burkhardt, U., Kim, T. K., Rosner, H., Grin, Y., Mackenzie, A. & King, P., 22 Jul 2020, In: Physical Review. B, Condensed matter and materials physics. 102, 9 p., 035143 .

    Research output: Contribution to journalArticlepeer-review

  5. Electronically driven spin-reorientation transition of the correlated polar metal Ca3Ru2O7

    Markovic, I., Watson, M. D., Clark, O. J., Mazzola, F., Abarca Morales, E., Hooley, C., Rosner, H., Polley, C. M., Balasubramanian, T., Mukherjee, S., Kikugawa, N., Sokolov, D. A., Mackenzie, A. & King, P. D. C., 7 Jul 2020, In: Proceedings of the National Academy of Sciences of the United States of America. 117, 27, p. 15524-15529 6 p.

    Research output: Contribution to journalArticlepeer-review

Related by journal

  1. Direct insight into the band structure of SrNbO3

    Bigi, C., Orgiani, P., Slawinska, J., Fujii, J., Irvine, J. T., Picozzi, S., Panaccione, G., Vobornik, I., Rossi, G., Payne, D. & Borgatti, F., 27 Feb 2020, In: Physical Review Materials. 4, 2, 7 p., 025006.

    Research output: Contribution to journalArticlepeer-review

  2. Morphology control of epitaxial monolayer transition metal dichalcogenides

    Rajan, A., Underwood, K., Mazzola, F. & King, P., Jan 2020, In: Physical Review Materials. 4, 1, 9 p., 014003.

    Research output: Contribution to journalArticlepeer-review

  3. Realizing square and diamond lattice S =1/2 Heisenberg antiferromagnet models in the α and β phases of the coordination framework, KTi(C2O4)2⋅xH2O

    Abdeldaim, A. H., Li, T., Farrar, L., Tsirlin, A. A., Yao, W., Gibbs, A. S., Manuel, P., Lightfoot, P., Nilsen, G. J. & Clark, L., 23 Oct 2020, In: Physical Review Materials. 4, 10, 104414.

    Research output: Contribution to journalArticlepeer-review

  4. Realizing square and diamond lattice S=1/2 Heisenberg antiferromagnet models in the alpha and beta phases of the coordination framework, KTi(C2O4)(2)center dot xH(2)O

    Abdeldaim, A. H., Li, T., Farrar, L., Tsirlin, A. A., Yao, W., Gibbs, A. S., Manuel, P., Lightfoot, P., Nilsen, G. J. & Clark, L., 23 Oct 2020, In: Physical Review Materials. 4, 10, 12 p., 104414.

    Research output: Contribution to journalArticlepeer-review

ID: 266359900

Top