Yoshida, Rikiya, Wakita, Takanori, Okazaki, Hiroyuki, Mizuguchi, Yoshikazu, Tsuda, Shunsuke, Takano, Yoshihiko, ...
We have performed soft x-ray and ultrahigh-resolution laser-excited photoemission measurements on tetragonal FeSe, which was recently identified as a superconductor. Energy dependent study of valence...
Superconductivity at 27 K in tetragonal FeSe under high pressure (2008)
Mizuguchi, Yoshikazu, Tomioka, Fumiaki, Tsuda, Shunsuke, Yamaguchi, Takahide, Takano, Yoshihiko
A huge enhancement of the superconducting transition temperature Tc was observed in tetragonal FeSe superconductor under high pressure. The onset temperature became as high as 27 K at 1.48 GPa and...
Ishii, Satoshi, Watanabe, Tohru, Ueda, Shinya, Tsuda, Shunsuke, Yamaguchi, Takahide, Takano, Yoshihiko
Boron-doped multi-walled carbon nanotubes (MWNTs) were synthesized using a methanol solution of boric acid as a source material. Accurate measurements of the electrical resistivity of an individual...
Superconductivity in Polycrystalline Diamond Thin Films (2005)
Takano, Yoshihiko, Nagao, Masanori, Takenouchi, Tomohiro, Umezawa, Hitoshi, Sakaguchi, Isao, Tachiki, Masashi, ...
Superconductivity was discovered in heavily boron-doped diamond thin films deposited by the microwave plasma assisted chemical vapor deposition (MPCVD) method. Advantages of the MPCVD deposited...
Advantage on Superconductivity of Heavily Boron-Doped (111) Diamond Films (2005)
Umezawa, Hitoshi, Takenouchi, Tomohiro, Takano, Yoshihiko, Kobayashi, Kensaku, Nagao, Masanori, Sakaguchi, Isao, ...
The superconductivity transition temperatures Tc(onset) of 11.4 K and Tc(offset) of 7.4 K, which are the highest in diamond at present, are realized on homoepitaxially grown (111) diamond films with...
Nakamura, Jin, Oguchi, Tamio, Yamada, Nobuyoshi, Kuroki, Kazuhiko, Okada, Kozo, Takano, Yoshihiko, ...
Carbon- and boron-2$p$ states of superconducting and non-superconducting boron-doped diamond samples are measured using soft X-ray emission and absorption spectroscopy. For the superconducting...
Growth of R-123 Phase Single Crystal Whiskers (2004)
Nagao, Masanori, Sato, Mitsunori, Tachiki, Yukitake, Miyagawa, Kinya, Tanaka, Masaki, Maeda, Hiroshi, ...
Single-crystal whiskers of R1Ba2Cu3Ox (R-123, R= La, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu) phase have been successfully grown by the Te- and Ca-doping method. The whiskers were grown from...
Superconducting Properties of Combustion Synthesized MgB2 (2004)
Takano, Yoshihiko, Oguro, Nobutaka, Kaieda, Yoshinari, Togano, Kazumasa
We have successfully prepared the MgB2 superconducting bulk and powdered materials by the method of combustion synthesis. The starting materials used in this study were powders of Mg and B. X-ray...
Takano, Yoshihiko, Hatano, Takeshi, Fukuyo, Akihiro, Ishii, Akira, Ohmori, Masashi, Arisawa, Shunichi, ...
An intrinsic tunnel junction was made using two Bi-2212 single crystal whiskers. The two whiskers with a cross-angle were overlaid at their c-planes and connected by annealing. The angular dependence...
A Cross-Whiskers Junction as a Novel Fabrication Process for Intrinsic Josephson Junction (2002)
Takano, Yoshihiko, Hatano, Takeshi, Fukuyo, Akihiro, Ishii, Akira, Arisawa, Shunichi, Tachiki, Masashi, ...
A Bi2Sr2CaCu2O8+d cross-whiskers junction has been successfully discovered as a novel intrinsic Josephson junction without using any technique for micro-fabrication. Two Bi2Sr2CaCu2O8+d whisker...
Fabrication of Bi2212 Cross Whiskers Junction (2002)
Takano, Yoshihiko, Hatano, Takeshi, Ishii, Akira, Fukuyo, Akihiro, Sato, Yoshimasa, Arisawa, Shunichi, ...
An intrinsic Josephson junction has been successfully fabricated without any micro-fabrication technique. Two Bi2212 whiskers were crossed with one another and joined by post-annealing. The...
Vibrational Density of States in Superconducting MgB$_2$ (2001)
Sato, Taku J, Shibata, Kaoru, Takano, Yoshihiko
This paper is withdrawn by the authors.