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Title: In situ investigation of the early stage of TiO{sub 2} epitaxy on (001) SrTiO{sub 3}

Abstract

We report on a systematic study of the growth of epitaxial TiO{sub 2} films deposited by pulsed laser deposition on Ti-terminated SrTiO{sub 3} (001) single crystals. By using in situ reflection high energy electron diffraction, low energy electron diffraction, x-ray photoemission spectroscopy, and scanning probe microscopy, we show that the stabilization of the anatase (001) phase is preceded by the growth of a few nanometers thick pseudomorphic Sr{sub x}TiO{sub 2+y} (x, y < 1) intermediate layer. The data demonstrate that the formation of this intermediate phase is related to the activation of a long range Sr migration from the SrTiO{sub 3} substrate into the film. Our results enrich the phase diagram of the Sr-Ti-O system under epitaxial strain opening a route for the study of the electronic and dielectric properties of the reported Sr-deficient SrTiO{sub 3} phase.

Authors:
 [1];  [2]; ; ;  [3];  [2];  [3];  [4];  [3];  [2];  [3];  [2]
  1. LSNS - EPFL, PH A2 354 (Batiment PH) Station 3 CH-1015 Lausanne (Switzerland)
  2. (Italy)
  3. CNR-SPIN, Complesso Universitario Monte S. Angelo, Via Cintia I-80126 Napoli (Italy)
  4. (Switzerland)
Publication Date:
OSTI Identifier:
22038648
Resource Type:
Journal Article
Journal Name:
Journal of Chemical Physics
Additional Journal Information:
Journal Volume: 135; Journal Issue: 3; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DIELECTRIC PROPERTIES; ELECTRON DIFFRACTION; ENERGY BEAM DEPOSITION; EPITAXY; FILMS; LASER RADIATION; LAYERS; MONOCRYSTALS; PHASE DIAGRAMS; PULSED IRRADIATION; SEMICONDUCTOR MATERIALS; STRONTIUM TITANATES; TITANIUM OXIDES; X RADIATION; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Radovic, M., CNR-SPIN, Complesso Universitario Monte S. Angelo, Via Cintia I-80126 Napoli, Salluzzo, M., Vaglio, R., Granozio, F. Miletto, Dipartimento di Fisica, Universita 'Federico II' di Napoli, Piazzale Tecchio, I-80126, Ristic, Z., Departement de Physique de la Matiere Condensee, University of Geneva, 24 Quai Ernest-Ansermet, CH-1211 Geneva 4, Di Capua, R., Dipartimento S.pe.S., Universita degli Studi del Molise - Via De Sanctis, I-86100 Campobasso, Lampis, N., and Laborvetro srl, via Calamattia 6, I-09134 Cagliari. In situ investigation of the early stage of TiO{sub 2} epitaxy on (001) SrTiO{sub 3}. United States: N. p., 2011. Web. doi:10.1063/1.3613637.
Radovic, M., CNR-SPIN, Complesso Universitario Monte S. Angelo, Via Cintia I-80126 Napoli, Salluzzo, M., Vaglio, R., Granozio, F. Miletto, Dipartimento di Fisica, Universita 'Federico II' di Napoli, Piazzale Tecchio, I-80126, Ristic, Z., Departement de Physique de la Matiere Condensee, University of Geneva, 24 Quai Ernest-Ansermet, CH-1211 Geneva 4, Di Capua, R., Dipartimento S.pe.S., Universita degli Studi del Molise - Via De Sanctis, I-86100 Campobasso, Lampis, N., & Laborvetro srl, via Calamattia 6, I-09134 Cagliari. In situ investigation of the early stage of TiO{sub 2} epitaxy on (001) SrTiO{sub 3}. United States. doi:10.1063/1.3613637.
Radovic, M., CNR-SPIN, Complesso Universitario Monte S. Angelo, Via Cintia I-80126 Napoli, Salluzzo, M., Vaglio, R., Granozio, F. Miletto, Dipartimento di Fisica, Universita 'Federico II' di Napoli, Piazzale Tecchio, I-80126, Ristic, Z., Departement de Physique de la Matiere Condensee, University of Geneva, 24 Quai Ernest-Ansermet, CH-1211 Geneva 4, Di Capua, R., Dipartimento S.pe.S., Universita degli Studi del Molise - Via De Sanctis, I-86100 Campobasso, Lampis, N., and Laborvetro srl, via Calamattia 6, I-09134 Cagliari. Thu . "In situ investigation of the early stage of TiO{sub 2} epitaxy on (001) SrTiO{sub 3}". United States. doi:10.1063/1.3613637.
@article{osti_22038648,
title = {In situ investigation of the early stage of TiO{sub 2} epitaxy on (001) SrTiO{sub 3}},
author = {Radovic, M. and CNR-SPIN, Complesso Universitario Monte S. Angelo, Via Cintia I-80126 Napoli and Salluzzo, M. and Vaglio, R. and Granozio, F. Miletto and Dipartimento di Fisica, Universita 'Federico II' di Napoli, Piazzale Tecchio, I-80126 and Ristic, Z. and Departement de Physique de la Matiere Condensee, University of Geneva, 24 Quai Ernest-Ansermet, CH-1211 Geneva 4 and Di Capua, R. and Dipartimento S.pe.S., Universita degli Studi del Molise - Via De Sanctis, I-86100 Campobasso and Lampis, N. and Laborvetro srl, via Calamattia 6, I-09134 Cagliari},
abstractNote = {We report on a systematic study of the growth of epitaxial TiO{sub 2} films deposited by pulsed laser deposition on Ti-terminated SrTiO{sub 3} (001) single crystals. By using in situ reflection high energy electron diffraction, low energy electron diffraction, x-ray photoemission spectroscopy, and scanning probe microscopy, we show that the stabilization of the anatase (001) phase is preceded by the growth of a few nanometers thick pseudomorphic Sr{sub x}TiO{sub 2+y} (x, y < 1) intermediate layer. The data demonstrate that the formation of this intermediate phase is related to the activation of a long range Sr migration from the SrTiO{sub 3} substrate into the film. Our results enrich the phase diagram of the Sr-Ti-O system under epitaxial strain opening a route for the study of the electronic and dielectric properties of the reported Sr-deficient SrTiO{sub 3} phase.},
doi = {10.1063/1.3613637},
journal = {Journal of Chemical Physics},
issn = {0021-9606},
number = 3,
volume = 135,
place = {United States},
year = {2011},
month = {7}
}