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The role of oxygen vacancies on the weak localization in LaNiO3-δ epitaxial thin films

Walke, P. and Gupta, S. and Li, Q.R. and Major, M. and Donner, W. and Mercey, B. and Lüders, U. (2018):
The role of oxygen vacancies on the weak localization in LaNiO3-δ epitaxial thin films.
In: Journal of Physics and Chemistry of Solids, PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND, pp. 1-5, 123, ISSN 00223697, DOI: 10.1016/j.jpcs.2018.07.003, [Online-Edition: https://doi.org/10.1016/j.jpcs.2018.07.003],
[Article]

Abstract

We report on the analysis of weak localization observed in epitaxial films of LaNiO3-δ deposited coherently on SrTiO3 (001) substrates using different oxygen pressures, controlling thus the oxygen stoichiometry δ. The structural and transport properties of 10 nm thick LaNiO3-δ films were investigated. In the films deposited under the lowest oxygen pressures, we observe localization effects at low temperatures, indicating first a high structural quality of the films, and second an influence of the growth conditions on the quantum transport properties of the nickelate. We will discuss the origin as well as the dimensionality of this effect, giving insight into novel and accurate strategies for the design of ultrathin LaNiO3 electrodes for improved next generation electronics devices.

Item Type: Article
Erschienen: 2018
Creators: Walke, P. and Gupta, S. and Li, Q.R. and Major, M. and Donner, W. and Mercey, B. and Lüders, U.
Title: The role of oxygen vacancies on the weak localization in LaNiO3-δ epitaxial thin films
Language: English
Abstract:

We report on the analysis of weak localization observed in epitaxial films of LaNiO3-δ deposited coherently on SrTiO3 (001) substrates using different oxygen pressures, controlling thus the oxygen stoichiometry δ. The structural and transport properties of 10 nm thick LaNiO3-δ films were investigated. In the films deposited under the lowest oxygen pressures, we observe localization effects at low temperatures, indicating first a high structural quality of the films, and second an influence of the growth conditions on the quantum transport properties of the nickelate. We will discuss the origin as well as the dimensionality of this effect, giving insight into novel and accurate strategies for the design of ultrathin LaNiO3 electrodes for improved next generation electronics devices.

Journal or Publication Title: Journal of Physics and Chemistry of Solids
Volume: 123
Publisher: PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Uncontrolled Keywords: Weak localization, Epitaxial film, Stoichiometry, Quantum transport
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science > Structure Research
Date Deposited: 17 Jan 2019 08:37
DOI: 10.1016/j.jpcs.2018.07.003
Official URL: https://doi.org/10.1016/j.jpcs.2018.07.003
Funders: . W. acknowledges a Marie Curie Initial Training Network Experienced Researcher Fellowship within the 7th European Community Framework Programme (SOPRANO project) and SERB-YSS/2015/001937 (Fast track young scientist research scheme) for financial support., Q-R. L. appreciates the financial support from Conseil Regional de Basse Normandie within the framework of International Doctoral School in Functional Materials (IDS FunMat).
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