85 citations · 241 across the 12 of their papers we have counts for
12 papers
High-pressure phase diagram, structural transitions, and persistent non-metallicity of BaBiO: theory and experiment
Roman Martoňák, Davide Ceresoli, Tomoko Kagayama +3
BaBiO is a mixed-valence perovskite which escapes the metallic state through a Bi valence (and Bi-O bond) disproportionation or CDW distortion, resulting in a semiconductor wit…
Pressure-induced topological phase transition in polar semiconductor BiTeBr
Ayako Ohmura, Yuichiro Higuchi, Takayuki Ochiai +6
We performed X-ray diffraction and electrical resistivity measurement up to pressures of 5 GPa and the first-principles calculations utilizing experimental structural parameters to…
Composition induced metal-insulator quantum phase transition in the Heusler type Fe2VAl
Takashi Naka, Artem M. Nikitin, Yu Pan +6
We report the magnetism and transport properties of the Heusler compound Fe2+xV1-xAl at -0.10 < x < 0.10 under pressure and a magnetic field. A metal-insulator quantum phase transi…
Thermodynamic Properties of Superconducting and Non-Superconducting PrBaCuO Compounds with Metallic Double Chains
Takahisa Konno, Michiaki Matsukawa, Keisuke Sugawara +1
To examine the thermodynamic properties of PrBaCuO compounds with metallic CuO double chains, we measured the specific heats of superconducting and non-s…
Collapse of CuO Double Chains and Suppression of Superconductivity in High-Pressure Phase of YBaCuO
Atsuko Nakayama, Yusuke Onda, Shuhei Yamada +8
The crystal structure and electrical resistivity of YBaCuO (Y124) were studied under high pressure up to 18 GPa using diamond-anvil cells, respectively, in order to cla…
Synthesis of New Layered Oxypnictides Sr2CrO2(FeAs)2
Naoya Eguchi, Fumihiro Ishikawa, Michihiro Kodama +4
We successfully synthesized new layered iron oxypnictide Sr2CrO2(FeAs)2 by solid-state-reaction techniques. This is the first report on the Fe-substituted Sr2Mn3As2O2-type oxypnict…
Relocation of the topological surface state of BiSe beneath the surface by Ag intercalation
M. Ye, S. V. Eremeev, K. Kuroda +16
We studied the Ag-intercalated 3D topological insulator BiSe by scanning tunneling microscopy/spectroscopy and angle-resolved photoemission spectroscopy, combined with…
Pressure-induced phase transition of Bi2Te3 into the bcc structure
Mari Einaga, Ayako Ohmura, Atsuko Nakayama +3
The pressure-induced phase transition of bismuth telluride, Bi2Te3, has been studied by synchrotron x-ray diffraction measurements at room temperature using a diamond-anvil cell (D…
Electronic States and Superconducting Transition Temperature based on the Tomonaga-Luttinger liquid in PrBaCuO
Tatsuro Habaguchi, Yoshiaki Ono, Hai Ying Du Gh +2
An NQR experiment revealed superconductivity of PrBaCuO (Pr247) to be realized on CuO double chain layers and suggests possibility of novel one-dimensional(1D)…
Pressure-induced superconductivity in EuCaFeAs : FeAs-based superconductivity hidden by antiferromagnetism of Eu sublattice
Akihiro Mitsuda, Tomohiro Matoba, Hirofumi Wada +2
To clarify superconductivity in EuFe2As2 hidden by antiferromagnetism of Eu2+, we investigated a Ca-substituted sample, Eu0.5Ca0.5Fe2As2, under high pressure. For ambient pressure,…
Physical properties of a new cuprate superconductor Pr_2Ba_4Cu_7O_{15-δ}
Akiyuki Matsushita, Kazunori Fukuda, Yuh Yamada +4
We present studies of the thermal, magnetic and electrical transport properties of reduced polycrystalline Pr_2Ba_4Cu_7O_{15-δ} (Pr247) showing a superconducting transition at Tc =…
Angle-resolved photoemission study of insulating and metallic Cu-O chains in PrBaCuO and PrBaCuO
T. Mizokawa, C. Kim, Z. -X. Shen +17
We compare the angle-resolved photoemission spectra of the hole-doped Cu-O chains in PrBaCuO (Pr123) and in PrBaCuO (Pr124). While, in Pr123, a dispersive f…