163 citations · 649 across the 39 of their papers we have counts for
30 papers · 1 filter
Discriminating superconducting fluctuations from the pseudogap in BiSrCaCuO: A magnetotransport study
Shunpei Yamaguchi, Nae Sasaki, Shintaro Adachi +13
Understanding the normal state is essential for uncovering the mechanism of high- superconductivity. We investigate magnetotransport in BiSrCaCuO and Bi$_2…
Probing the Meissner effect in single crystals of via wide-field quantum microscopy under high pressure
Masahiro Ohkuma, Ryo Matsumoto, Shintaro Adachi +5
We investigated the pressure dependence of the superconducting transition temperature () in optimally doped BiSrCaCuO (Bi-2223) single crystals…
High-pressure synthesis of bilayer nickelate SrNiOCl with tetragonal crystal structure
Kazuki Yamane, Yoshitaka Matsushita, Shintaro Adachi +5
A novel oxychloride, SrNiOCl, was synthesized for the first time under high pressure of 10 GPa at 1400 C, motivated by a theoretical prediction of…
High-pressure synthesis of superconducting SnS using diamond anvil cell with boron-doped diamond heater
Ryo Matsumoto, Kensei Terashima, Satoshi Nakano +8
High-pressure techniques open exploration of functional materials in broad research fields. An established diamond anvil cell with a boron-doped diamond heater and transport measur…
Diamond anvil cell with boron-doped diamond heater for high-pressure synthesis and in-situ transport measurements
Ryo Matsumoto, Sayaka Yamamoto, Shintaro Adachi +3
Temperature and pressure are essential parameters in the synthesis, evaluation, and application of functional materials. This study proposes the addition of a heating function to a…
Pressure-induced superconductivity in TiGeTe
Sayaka Yamamoto, Ryo Matsumoto, Shintaro Adachi +5
Layered ternary transition-metal chalcogenides have been focused as a vein of exploration for superconductors. In this study, TiGeTe single crystals were synthesized and char…
High pressure effects on La(O,F)BiS single crystal using diamond anvil cell with dual-probe diamond electrodes
Sayaka Yamamoto, Ryo Matsumoto, Shintaro Adachi +1
The high-pressure phase of La(O,F)BiS exhibits the highest transition temperature among all the BiS-based superconductors. Various studies, such as in…
THz emission from a Bi2Sr2CaCu2O8+δ cross-whisker junction
Yoshito Saito, Shintaro Adachi, Ryo Matsumoto +7
Cuprate superconductor Bi2Sr2CaCu2O8+δ (BSCCO) has been a promising candidate of a coherent, continuous, and compact THz light source owing to its intrinsic Josephson junction insi…
Observation of small Fermi pockets protected by clean CuO2 sheets of a high-Tc superconductor
So Kunisada, Shunsuke Isono, Yoshimitsu Kohama +15
The superconductivity of high transition temperature (Tc) occurs in copper oxides with carrier-doping to an antiferromagnetic (AF) Mott insulator. This discovery more than thirty y…
Pressure-Induced Superconductivity in Layered Transition-metal Chalcogenides (Zr,Hf)GeTe Explored by Data-driven Approach
Ryo Matsumoto, Zhufeng Hou, Shintaro Adachi +6
Layered transition-metal chalcogenides (Zr,Hf)GeTe were screened out from database of Atomwork as a candidate for pressure-induced superconductivity due to their narrow band…
Electrical transport measurements for superconducting sulfur hydrides using boron-doped diamond electrodes on beveled diamond anvil
Ryo Matsumoto, Mari Einaga, Shintaro Adachi +7
A diamond anvil cell (DAC) which can generate extremely high pressure of multi-megabar is promising tool to develop a further physics such a high-transition temperature superconduc…
Electronic phase diagram of FeTeSe revealed by magnetotransport measurements
Takao Watanabe, Takumi Otsuka, Shotaro Hagisawa +10
Among the Fe-based superconductors, FeTeSe is unique in that its crystal structure is the simplest and the electron correlation level is the strongest, and th…
Crystal Size Improvement of Bi-based Superconducting Whiskers under Stress-controlled Condition
Sayaka Yamamoto, Ryo Matsumoto, Shintaro Adachi +3
Using stress-controlled amorphous precursors, we have successfully grown large (Bi-based) high-transition tempe…
Role of the inner copper-oxide plane in interlayer Josephson effects in multi-layered cuprate superconductors
Y. Nomura, R. Okamoto, T. Mizuno +4
We find systematic signatures suggesting a different superconducting nature for a triple-layered cuprate BiSrCaCuO with respect to a double-layer through t…
Incoherent-coherent crossover and the pseudogap in Te-annealed superconducting FeTeSe revealed by magnetotransport measurements
Takumi Otsuka, Shotaro Hagisawa, Yuta Koshika +9
In this study, we conducted various magnetotransport measurements on FeTeSe single crystals from which excess iron was sufficiently removed. Our results revea…
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…
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…