75 citations · 538 across the 27 of their papers we have counts for
27 papers
Pressure-induced superconductivity in SnSb2Te4
Peng Song, Ryo Matsumoto, Zhufeng Hou +6
We report the discovery of a new superconductor from phase change materials SnSb2Te4. Single crystals of SnSb2Te4 were grown using a conventional melting-growth method. The sample…
Fabrication of Superconducting YBa2Cu4O8 Film via Coprecipitation
Hiroshi Hara, Shintaro Adachi, Ryo Matsumoto +3
We have successfully synthesized the c-axis oriented YBa2Cu4O8 (Y-124) film on a SrTiO3 (1 0 0) substrate via a coprecipitation and a dip-coating method. The precipitations includi…
Synthesis of Hg-based cuprate superconductors by CsCl flux additional method
Hiroshi Hara, Ryo Matsumoto, Shintaro Adachi +3
We have succeeded in the synthesis of Re-doped quickly by a sealed tube technique with a bit of CsCl flux. Powder X-ray diffraction measurement…
Data-driven Exploration of Pressure-Induced Superconductivity in AgInSe
Ryo Matsumoto, Hiroshi Hara, Zhufeng Hou +8
Candidates compounds for new thermoelectric and superconducting materials, which have narrow band gap and flat bands near band edges, were exhaustively searched by a high-throughpu…
Pressure-induced Superconductivity in Tin Sulfide
Ryo Matsumoto, Peng Song, Shintaro Adachi +8
Tin sulfide (SnS) was successfully synthesized in single crystals by a melt and slow-cooling method. The obtained sample was characterized by an X-ray diffraction, an energy disper…
Pressure-induced Insulator to Metal Transition of Mixed Valence Compound Ce(O,F)SbS
Ryo Matsumoto, Masanori Nagao, Masayuki Ochi +11
Transport properties of CeF0.15SbS and undoped CeOSbS under high pressure were investigated experimentally and theoretically. Electrical resistivity measuremen…
Single Crystal Growth of Cuprate Superconductor (LuNd)BaCuO by KOH Flux Method
Hiroshi Hara, Shintaro Adachi, Ryo Matsumoto +3
Single crystals of Nd-substituted LuBaCuO were successfully grown by the KOH flux method. The single phase of LuNdBaCuO [(Lu,Nd)124] formed at $…
Pressure Effect in Bi-2212 and Bi-2223 Cuprate Superconductor
Shintaro Adachi, Ryo Matsumoto, Hiroshi Hara +5
We report the pressure effect in Bi2Sr2Ca2Cu3O10+δ (Bi-2223) single crystal with a small amount of intergrowth of Bi2Sr2CaCu2O8+δ (Bi-2212). Their superconducting transition temper…
Data-driven Exploration of New Pressure-induced Superconductivity in PbBiTe with Two Transition Temperatures
Ryo Matsumoto, Zhufeng Hou, Masanori Nagao +10
Candidates compounds for new thermoelectric and superconducting materials, which have narrow band gap and flat bands near band edges, were exhaustively searched by the high-through…
Pressure-induced Superconductivity in Sulfur-doped SnSe Single Crystal Using Boron-doped Diamond Electrode-prefabricated Diamond Anvil Cell
Ryo Matsumoto, Hiroshi Hara, Hiromi Tanaka +8
Sulfur-doped SnSe single crystal was successfully synthesized using a melt and slow-cooling method. The chemical composition and valence state of the obtained sample were analyzed…
Two Pressure-induced Superconducting Transitions in SnBiSe Explored by Data-driven Materials Search: New Approach to Develop Novel Functional Materials Including Thermoelectric and Superconducting Materials
Ryo Matsumoto, Zhufeng Hou, Hiroshi Hara +4
Candidates for new thermoelectric and superconducting materials, which have narrow band gap and flat bands near band edges, were searched by the high-throughput first-principles ca…
Diamond anvil cell using boron-doped diamond electrodes covered with undoped diamond insulating layer
Ryo Matsumoto, Aichi Yamashita, Hiroshi Hara +4
Diamond anvil cell using boron-doped metallic diamond electrodes covered with undoped diamond insulating layer have been developed for electrical transport measurements under high…
Observation of Zero Resistance in As-Electrodeposited FeSe
Aichi Yamashita, Ryo Matsumoto, Masashi Tanaka +5
Superconducting FeSe films were electrochemically deposited on rolling-assisted biaxially textured substrate (RABiTS) tape. We observed zero resistivity in the as-electrodeposited…
Electronic Transport Properties of Carrier Controlled SnSe Single Crystals
Aichi Yamashita, Osamu Ogiso, Ryo Matsumoto +6
We found that the electronic transport property of SnSe single crystals was sensitive to oxygen content. Semiconducting SnSe single crystals were obtained by using Sn of grain form…
Phase-separation control of KFeSe superconductor through rapid-quenching process
Yusuke Yanagisawa, Masashi Tanaka, Aichi Yamashita +5
KFeSe exhibits an iron-vacancy ordering at C and separates into two phases: a minor superconducting (iron-vacancy-disordered) phase and a majo…
Superconductivity in FeTe{1-x}S_x induced by electrochemical reaction using ionic liquid solution
Aichi Yamashita, Satoshi Demura, Masashi Tanaka +11
Superconductivity in FeTe0.8S0.2 is successfully induced by an electrochemical reaction using an ionic liquid solution. A clear correlation between the Fe concentration in the solu…
Superconductivity in FeTe0.8S0.2 induced by battery-like reaction
Aichi Yamashita, Satoshi Demura, Masashi Tanaka +11
Superconductivity is successfully induced by utilizing a battery-like reaction found in a typical Li-ion battery. Excess Fe in FeTe0.8S0.2 is electrochemically de-intercalated by a…
Coexistence of bulk superconductivity and ferromagnetism in CeO1-xFxBiS2
Satoshi Demura, Keita Deguchi, Yoshikazu Mizuguchi +14
We show the observation of the coexistence of bulk superconductivity and ferromagnetism in CeO1-xFxBiS2(x = 0 - 1.0) prepared by annealing under high-pressure. In CeO1-xFxBiS2 syst…
Phase diagram and superconductivity at 58.1 K in α-FeAs free SmFeAsO1-xFx
Masaya Fujioka, Saleem James Denholme, Toshinori Ozaki +9
The Phase diagram of SmFeAsO1-xFx in terms of x is exhibited in this study. SmFeAsO1-xFx from x = 0 to x = 0.3 were prepared by low temperature sintering with slow cooling. The low…
Superconductivity in Fe1+dTe0.9Se0.1 induced by deintercalation of excess Fe using alcoholic beverage treatment
K. Deguchi, S. Demura, H. Hara +8
Superconductivity in polycrystalline Fe1+dTe0.9Se0.1 was enhanced by heating in alcoholic beverages. We found that part of the excess Fe was deintercalated from the interlayer site…
Evolution of superconductivity in isovalent Te-substituted KxFe2-ySe2 crystals
Toshinori Ozaki, Hiroyuki Takeya, Keita Deguchi +8
We report the evolution of superconductivity and the phase diagram of the KxFe2-ySe2-zTez (z=0-0.6) crystals grown by a simple one-step synthesis. No structural transition is obser…
BiS2 - based superconductivity in F-substituted NdOBiS2
Satoshi Demura, Yoshikazu Mizuguchi, Keita Deguchi +12
We have successfully synthesized a new BiS2-based superconductor NdOBiS2 with F-doping. This compound is composed of superconducting BiS2 layers and blocking NdO layers, which indi…
Electrodeposition as a new route to synthesize superconducting FeSe
Satoshi Demura, Hiroyuki Okazaki, Toshinori Ozaki +9
We have successfully synthesized FeSe films by the electrochemical deposition in the electrolyte containing FeCl_{2}\cdot4H_{2}O, SeO_{2} and Na_{2}SO_{4}. The composition ratio of…
Tartaric acid in red wine as one of the key factors to induce superconductivity in FeTe0.8S0.2
Keita Deguchi, Tohru Okuda, Yasuna Kawasaki +10
The red wine dependence of superconductivity in FeTe0.8S0.2 was investigated. Samples with a higher shielding volume fraction had a tendency to show a higher concentration of tarta…