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...
Yoshida, Rikiya, Okazaki, Hiroyuki, Tajima, Mitsutoshi, Muro, Takayuki, Hase, Izumi, Okada, Kozo, ...
We have performed x-ray photoemission spectroscopy on the system of noncentrosymmetric superconductor, Li$_2$(Pd$_x$Pt$_{1-x}$3)B. For Li$_2$Pt$_3$B, we found 2 major peaks with 2 other weak...
Precise Control of Band Filling in NaxCoO2 (2007)
Yoshizumi, Daisuke, Muraoka, Yuji, Okamoto, Yoshihiko, Kiuchi, Yoko, Yamaura, Jun-Ichi, Mochizuki, Masahito, ...
Electronic properties of the sodium cobaltate NaxCoO2 are systematically studied through a precise control of band filling. Resistivity, magnetic susceptibility and specific heat measurements are...
Crystal structure of the pyrochlore oxide superconductor KOs$_2$O$_6$ (2005)
Yamaura, Jun-Ichi, Yonezawa, Shigeki, Muraoka, Yuji, Hiroi, Zenji
We report the single-crystal X-ray analysis of the structure of the pyrochlore oxide superconductor KOs$_2$O$_6$. The structure was identified as the $\beta$-pyrochlore structure with space group...
Erratum to Three Papers on the beta-Pyrochlore Oxide Superconductors (2005)
Hiroi, Zenji, Yonezawa, Shigeki, Yamaura, Jun-Ichi, Muramatsu, Takaki, Matsushita, Yoshitaka, Muraoka, Yuji
The magnitude of magnetic fields given in the three papers that report on the superconductivity of the beta-pyrochlore oxides is corrected.
Muramatsu, Takaki, Muraoka, Yuji, Hiroi, Zenji
An epitaxial heterojunction made of a p-type perovskite manganite La0.8Sr0.2MnO3 film and an n-type strontium titanate SrTiO3:Nb substrate has been fabricated by the pulsed laser deposition...
Second Anomaly in the Specific Heat of beta-Pyrochlore Oxide Superconductor KOs2O6 (2005)
Hiroi, Zenji, Yonezawa, Shigeki, Yamaura, Jun-Ichi, Muramatsu, Takaki, Muraoka, Yuji
Resistivity and specific heat have been measured on a single crystalline sample of the beta-pyrochlore oxide superconductor, KOs2O6. It is found that a second peak in specific heat, which may...
Specific Heat of the beta-Pyrochlore Oxide Superconductors CsOs2O6 and RbOs2O6 (2005)
Hiroi, Zenji, Yonezawa, Shigeki, Muramatsu, Takaki, Yamaura, Jun-Ichi, Muraoka, Yuji
Two beta-pyrochlore oxide superconductors, CsOs2O6 and RbOs2O6, are studied thermodynamically by measuring specific heat on polycrystalline samples. It is found that a Sommerfeld coefficient ? is...
High Pressure Effects on Superconductivity in the beta-pyrochlore Oxides AOs2O6 (A=K, Rb, Cs) (2004)
Muramatsu, Takaki, Yonezawa, Shigeki, Muraoka, Yuji, Hiroi, Zenji
Recently new pyrochlore oxides superconductors AOs2O6 (A=K,Rb,Cs) were found and we measured the pressure dependence of magnetization up to 1.2 GPa in order to deduce the pressure effect of Tc in the...
Muramatsu, Takaki, Muraoka, Yuji, Hiroi, Zenji
Oxide heterojunctions made of p-type L0.8Sr0.2MnO3 (LSMO) and niobium-doped n-type SrTiO3 (STO:Nb) have been fabricated by the pulsed laser deposition (PLD) technique and are characterized under UV...
New beta-Pyrochlore Oxide Superconductor CsOs2O6 (2004)
Yonezawa, Shigeki, Muraoka, Yuji, Hiroi, Zenji
The discovery of a new beta-pyrochlore oxide superconductor CsOs2O6 with Tc = 3.3 K is reported. It is the third superconductor in the family of beta-pyrochlore oxides, following KOs2O6 with Tc = 9.6...
The second phase transition in the pyrochlore oxide Cd2Re2O7 (2002)
Hiroi, Zenji, Yamaura, Jun-Ichi, Muraoka, Yuji, Hanawa, Masafumi
Evidence for another phase transition at 120 K in the metallic pyrochlore oxide Cd2Re2O7, following the structural transition at 200 K and followed by the superconducting transition at 1.0 K, is...