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13 results on '"Taguchi, Tomoya"'

5. Superconducting properties of (NH3)yLixFeSe0.5Te0.5 under pressure

Author

Yang, Xiaofan, primary, He, Tong, additional, Taguchi, Tomoya, additional, Li, Huan, additional, Wang, Yanan, additional, Goto, Hidenori, additional, Eguchi, Ritsuko, additional, Miyazaki, Takafumi, additional, Yamaoka, Hitoshi, additional, Ishii, Hirofumi, additional, Liao, Yen-Fa, additional, and Kubozono, Yoshihiro, additional

Published
2019
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7. Superconducting behavior of a new metal iridate compound, SrIr2, under pressure

Author

Yang, Xiaofan, primary, Li, Huan, additional, He, Tong, additional, Taguchi, Tomoya, additional, Wang, Yanan, additional, Goto, Hidenori, additional, Eguchi, Ritsuko, additional, Horie, Rie, additional, Horigane, Kazumasa, additional, Kobayashi, Kaya, additional, Akimitsu, Jun, additional, Ishii, Hirofumi, additional, Liao, Yen-Fa, additional, Yamaoka, Hitoshi, additional, and Kubozono, Yoshihiro, additional

Published
2019
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9. Preparation and characterization of a new metal-intercalated graphite superconductor

Author

Yang, Xiaofan, primary, Taguchi, Tomoya, additional, Wang, Yanan, additional, He, Tong, additional, Uchiyama, Takaki, additional, Takai, Akihisa, additional, Zhi, Lei, additional, Miyazaki, Takafumi, additional, Goto, Hidenori, additional, Eguchi, Ritsuko, additional, Ishii, Hirofumi, additional, Liao, Yen-Fa, additional, Yamaoka, Hitoshi, additional, and Kubozono, Yoshihiro, additional

Published
2018
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12. Superconducting properties of (NH3)yLixFeSe0.5Te0.5 under pressure.

Author

Yang, Xiaofan, He, Tong, Taguchi, Tomoya, Li, Huan, Wang, Yanan, Goto, Hidenori, Eguchi, Ritsuko, Miyazaki, Takafumi, Yamaoka, Hitoshi, Ishii, Hirofumi, Liao, Yen-Fa, and Kubozono, Yoshihiro

Subjects
SUPERCONDUCTING transition temperature, PHASE diagrams, GALLIUM antimonide, CRITICAL point (Thermodynamics), PHASE transitions
Abstract

We prepared two superconducting phases of (NH3)yLixFeSe0.5Te0.5, which show superconducting transition temperatures (Tc's) as high as 20.2 and 29.5 K at ambient pressure, here called the 'low-Tc phase' and 'high-Tc phase'. The temperature dependence of electrical resistance (R) was measured for the low-Tc phase of (NH3)yLixFeSe0.5Te0.5 over a pressure (p) range of 0–14 GPa, and for the high-Tc phase of (NH3)yLixFeSe0.5Te0.5 over 0–19 GPa, yielding double-dome superconducting Tc–p phase diagrams, i.e. two superconducting phases (SC-I and SC-II) were found for both the low-Tc and high-Tc phases under pressure. For the low-Tc phase, the maximum Tc was 20.2 K at 0 GPa for SC-I, and 19.9 K at 8.98 GPa for SC-II. For the high-Tc phase, the maximum Tc was 33.0 K at 1.00 GPa for SC-I, and 24.0 K at 11.5–13.2 GPa for SC-II. These results imply that the maximum Tc value of the high pressure phase (SC-II) does not exceed the maximum value of the SC-I, unlike what was shown in the Tc–p phase diagrams of (NH3)yLixFeSe and (NH3)yCsxFeSe investigated previously. Nevertheless, the double-dome Tc–p phase diagram was found in metal-doped FeSe0.5Te0.5, indicating that this feature is universal in metal-doped FeSe1−zTez. Moreover, no structural phase transitions were observed for either the low-Tc or high-Tc phases of (NH3)yLixFeSe0.5Te0.5 over the wide pressure range of 0–15.3 GPa, and the Tc-lattice constant (c) plots for both phases were recorded to determine the critical point separating SC-I and SC-II. [ABSTRACT FROM AUTHOR]

Published
2019
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13. Plasmon-Resonant Optics on an Indium–Tin-Oxide Film for Exciting a Two-Photon Photochromic Reaction

Author

Ochiai, Takao, Isozaki, Katsuhiro, Pincella, Francesca, Taguchi, Tomoya, Nittoh, Koh-ichi, and Miki, Kazushi

Abstract

Two-dimensional arrays of gold nanoparticles (AuNPs) as localized surface plasmon-resonant (LSPR) optics on a transparent conductive layer of indium–tin-oxide (ITO) were successfully fabricated. The typical surface coverage of the 10 nm sized AuNPs is over 87% for on ITO film roughness of ±0.2 nm. The LSPR wavelength is tunable in the range of 622–905 nm. By adjusting the LSPR wavelength to 905 nm at peak, two-photon photochromic reaction of diarylethene derivative in solution phase was demonstrated with irradiation by an incoherent near-infrared light in the range of 0.017–0.033 W/cm2 instead of a laser, thanks to the AuNP two-dimensional array.

Published
2013

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