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Article
Open AccessSuperconductivity in Ti4O7 and γ-Ti3O5 films
Titanium dioxide is one of the most popular compounds among simple oxides. Except for the fully oxidized titanate, titanium oxides have partially filled d states and their exotic properties have captured attentio...
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Article
Open AccessReversible superconductor-insulator transition in LiTi2O4 induced by Li-ion electrochemical reaction
Transition metal oxides display various electronic and magnetic phases such as high-temperature superconductivity. Controlling such exotic properties by applying an external field is one of the biggest continu...
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Article
High Throughput X-ray Diffractometer for Combinatorial Epitaxial Thin Films
We report on the development of a high throughput x-ray diffractometer that concurrently measures spatially resolved x-ray diffraction (XRD) spectra of epitaxial thin films integrated on a substrate. A converg...
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Article
Control of the Polarity and Surface Morphology of GaN Films Deposited on C-Plane Sapphire
Control of the polarity of GaN films deposited by metalorganic chemical vapor deposition was achieved by substrate nitridation and subsequent annealing of a buffer layer. The surface morphology and optical pro...
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Article
Observation of the fractional quantum Hall effect in an oxide
The fabrication of oxide thin-film heterostructures has improved considerably over the past few years. The first demonstration of the fractional quantum Hall effect in an oxide now attests to the potential of ...
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Article
Electric-field-induced superconductivity in an insulator
Increasing the carrier density of a material to the limit at which superconductivity can be induced has been a long-standing challenge. This is now realized in an insulator by using an electric-double-layer ga...
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Chapter
Epitaxial Growth and Transport Properties of High-Mobility ZnO-Based Heterostructures
Optimization of growth conditions is most important for extracting desired material properties, but it always requires time-consuming experiments. The temperature gradient method was applied for high-throughpu...
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Article
Correction: Corrigendum: A high-mobility electron gas at the LaAlO3/SrTiO3 heterointerface
Nature 427, 423–426 (2004) In Fig. 2a and b of this Letter, the y axis should be labelled in units of ohms per square, not milli-ohms per square. This error does not occur elsewhere in the paper, and does not ...
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Article
Fabrication of Ternary Phase Composition-Spread Thin Film Libraries and Their High-Throughput Characterization: Ti1− x − y Zr x Hf y O2 for Bandgap Engineering
Ternary phase composition-spread thin film libraries, TiO2-ZrO2-HfO2, were synthesized by using a combinatorial pulsed laser deposition system. The composition, crystalline structure, and optical transmission pro...
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Article
A high-mobility electron gas at the LaAlO3/SrTiO3 heterointerface
Polarity discontinuities at the interfaces between different crystalline materials (heterointerfaces) can lead to nontrivial local atomic and electronic structure, owing to the presence of dangling bonds and i...
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Article
Artificial charge-modulationin atomic-scale perovskite titanate superlattices
The nature and length scales of charge screening in complex oxides are fundamental to a wide range of systems, spanning ceramic voltage-dependent resistors (varistors), oxide tunnel junctions and charge orderi...
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Article
Control of the Polarity and Surface Morphology of GaN Films Deposited on C-Plane Sapphire
Control of the polarity of GaN films deposited by metalorganic chemical vapor deposition was achieved by substrate nitridation and subsequent annealing of a buffer layer. The surface morphology and optical pro...
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Article
Oxide Quantum Structures for Future Electro-Photonics
We show our recent development on the epitaxial growth of oxide thin films by laser molecular beam epitaxy directed towards a possible new field of electro-photonics based on metal-oxide quantum structures. Ex...
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Article
Transmission Electron Microscopy Study of Room Temperature Lasing Epitaxial ZnO Films on Sapphire
We have studied the microstructures of lasing and non-lasing ZnO films on sapphire in plan-view and cross-section by transmission electron microscopy (TEM). While ZnO films in general are made up of cloumnar c...
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Article
Materials Aspects of Oxide Superconductors - Effect of Ambient Water on Superconductivity-
It has been found that the chemical instability of Ba2LnCu3O7 causes some problems in the measurements of critical temperature and creates a highly resistive grain boundary contact which is the major cause of the...
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Article
Abnormal grain growth behavior of an Oxide Dispersion Strengthened Superalloy
To obtain a superior high temperature creep strength, the transformation of fine-grained structure to large elongated grains by abnormal grain growth is an important process for oxide dispersion strengthened s...
