163 citations · 649 across the 39 of their papers we have counts for
40 papers
Diamond quantum-sensing platform with integrated boron-doped diamond microwave antenna and thermometer
Masahiro Ohkuma, Ryo Matsumoto, Shintaro Adachi +5
Wide-field nitrogen-vacancy (NV) magnetic imaging at cryogenic temperatures requires microwave excitation and reliable knowledge of the temperature near the sensing region. Here, w…
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…
Proximity-Induced Nodal Metal in an Extremely Underdoped CuO Plane in Triple-Layer Cuprates
Shin-ichiro Ideta, Shintaro Adachi, Takashi Noji +15
ARPES studies have established that the high- cuprates with single and double CuO layers evolve from the Mott insulator to the pseudogap state with a Fermi arc, on which t…
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…
Enhancement of giant refrigerant capacity in HoGdB alloys (0.1 x 0.4)
Pedro Baptista de Castro, Kensei Terashima, Takafumi D Yamamoto +8
Intending to optimize the giant magnetocaloric properties of HoB, we synthesized and magnetocalorically characterized HoGdB(0.1 x 0.4) alloy…
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…
Effect of Dy substitution in the giant magnetocaloric properties of HoB
Pedro Baptista de Castro, Kensei Terashima, Takafumi D. Yamamoto +6
Recently, a massive magnetocaloric effect near the liquefaction temperature of hydrogen has been reported in the ferromagnetic material HoB. Here we investigate the effects o…
Machine Learning Guided Discovery of Gigantic Magnetocaloric Effect in HoB Near Hydrogen Liquefaction Temperature
Pedro Baptista de Castro, Kensei Terashima, Takafumi D Yamamoto +8
Magnetic refrigeration exploits the magnetocaloric effect which is the entropy change upon application and removal of magnetic fields in materials, providing an alternate path for…
Demonstration of Electric Double Layer Gating under High Pressure by the Development of Field-Effect Diamond Anvil Cell
Shintaro Adachi, Ryo Matsumoto, Sayaka Yamamoto +9
We have developed an approach to control the carrier density in various material under high pressure by the combination of an electric double layer transistor (EDLT) with a diamond…
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…
Direct Patterning of Boron-doped Amorphous Carbon Using Focused Ion Beam-assisted Chemical Vapor Deposition
Ryo Matsumoto, El Hadi S. Sadki, Hiromi Tanaka +4
The deposition of boron-doped amorphous carbon thin films on SiO2 substrate was achieved via a focused ion beam-assisted chemical vapor deposition of triphenyl borane (C18H15B) and…
Mask-less Patterning of Gallium-irradiated Superconducting Silicon Using Focused Ion Beam
Ryo Matsumoto, Shintaro Adachi, El Hadi S. Sadki +4
A direct patterning technique of gallium-irradiated superconducting silicon has been established by focused gallium-ion beam without any mask-based lithography process. The electri…
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…
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…