Growth control of oxygen stoichiometry in homoepitaxial SrTiO3 films by pulsed laser epitaxy in high vacuum
Ho Nyung Lee,Sung Seok A. Seo,Sung Seok A. Seo,Woo Seok Choi,Woo Seok Choi,Christopher M. Rouleau +5 more
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TLDR
This work shows that, through proper control of the plume kinetic energy, stoichiometric crystalline films can be synthesized without generating oxygen defects even in high vacuum, and expands the utility of pulsed laser epitaxy of other materials as well.Abstract:
In many transition metal oxides, oxygen stoichiometry is one of the most critical parameters that plays a key role in determining the structural, physical, optical, and electrochemical properties of the material. However, controlling the growth to obtain high quality single crystal films having the right oxygen stoichiometry, especially in a high vacuum environment, has been viewed as a challenge. In this work, we show that, through proper control of the plume kinetic energy, stoichiometric crystalline films can be synthesized without generating oxygen defects even in high vacuum. We use a model homoepitaxial system of SrTiO3 (STO) thin films on single crystal STO substrates. Physical property measurements indicate that oxygen vacancy generation in high vacuum is strongly influenced by the energetics of the laser plume, and it can be controlled by proper laser beam delivery. Therefore, our finding not only provides essential insight into oxygen stoichiometry control in high vacuum for understanding the fundamental properties of STO-based thin films and heterostructures, but expands the utility of pulsed laser epitaxy of other materials as well.read more
Citations
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Tuning perovskite oxides by strain: Electronic structure, properties, and functions in (electro)catalysis and ferroelectricity
Jonathan Hwang,Zhenxing Feng,Nenian Charles,Xiao Renshaw Wang,Xiao Renshaw Wang,Dongkyu Lee,Kelsey A. Stoerzinger,Sokseiha Muy,Reshma R. Rao,Dongwook Lee,Ryan Jacobs,Dane Morgan,Yang Shao-Horn +12 more
TL;DR: In this article, the role of strain on oxide electronic properties was identified, driven by the combination of modification of B O bond length and octahedral distortion in perovskites.
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Multistaged discharge constructing heterostructure with enhanced solid-solution behavior for long-life lithium-oxygen batteries.
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Strain coupling of oxygen non-stoichiometry in perovskite thin films
TL;DR: A comprehensive overview on the coupling between strain and oxygen vacancies in perovskite oxides is given and the potential applications of the emergent functionalities strongly coupled to oxygen vacancies are pointed out.
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Stimulating Oxide Heterostructures: A Review on Controlling SrTiO3‐Based Heterointerfaces with External Stimuli
Dennis Christensen,Felix Trier,Wei Niu,Wei Niu,Yulin Gan,Yu Zhang,Yu Zhang,Thomas Sand Jespersen,Yunzhong Chen,Nini Pryds +9 more
TL;DR: In this paper, the authors review how the properties of oxide-based heterostructures can be changed by external stimuli using electric fields, magnetic fields, light, stress, particle bombardment, liquids, gases and temperature.
References
More filters
Journal ArticleDOI
Room-temperature ferroelectricity in strained SrTiO3.
J. H. Haeni,Patrick Irvin,Wontae Chang,Reinhard Uecker,P. Reiche,Y. L. Li,Somnath Choudhury,Wei Tian,Marilyn E. Hawley,B. Craigo,Alexander K. Tagantsev,Xiaoqing Pan,Stephen K. Streiffer,Long Qing Chen,Steven W. Kirchoefer,Jeremy Levy,Darrell G. Schlom +16 more
TL;DR: It is shown that epitaxial strain from a newly developed substrate can be harnessed to increase Tc by hundreds of degrees and produce room-temperature ferro electricity in strontium titanate, a material that is not normally ferroelectric at any temperature.
Journal ArticleDOI
Atomic Control of the SrTiO3 Crystal Surface
Masashi Kawasaki,Kazuhiro Takahashi,Tatsuro Maeda,Ryuta Tsuchiya,Makoto Shinohara,Osamu Ishiyama,Takuzo Yonezawa,Mamoru Yoshimoto,Hideomi Koinuma +8 more
TL;DR: The atomically smooth SrTiO3 (100) with steps one unit cell in height was obtained by treating the crystal surface with a pH-controlled NH4F-HF solution, providing a well-defined substrate surface for atomically regulated epitaxial growth of such perovskite oxide films as YBa2Cu3O7-δ.
Journal ArticleDOI
Strain Tuning of Ferroelectric Thin Films
Darrell G. Schlom,Long Qing Chen,Chang-Beom Eom,Karin M. Rabe,Stephen K. Streiffer,Jean-Marc Triscone +5 more
TL;DR: In this paper, the effect of biaxial strain on the properties of epitaxial ferroelectric thin films and superlattices is discussed. But the results for single-layer thin films are not discussed.
Journal ArticleDOI
Electric-field-induced superconductivity in an insulator
Kazunori Ueno,Shintaro Nakamura,Hidekazu Shimotani,Akira Ohtomo,Noriaki Kimura,Tsutomu Nojima,Haruyoshi Aoki,Yoshihiro Iwasa,Masashi Kawasaki +8 more
TL;DR: Electric-field-induced superconductivity in an insulator is reported by using an electric-double-layer gating in an organic electrolyte using a pristine SrTiO(3) single-crystal channel, indicating this method as promising for searching for unprecedented superconducting states.
Journal ArticleDOI
Artificial charge-modulationin atomic-scale perovskite titanate superlattices
TL;DR: It is found that a minimum thickness of five LaTiO3 layers is required for the centre titanium site to recover bulk-like electronic properties, and this represents a framework within which the short-length-scale electronic response can be probed and incorporated in thin-film oxide heterostructures.