437 citations · 1.9k across the 44 of their papers we have counts for
44 papers
Absence of Tc-Pinning Phenomenon Under High Pressure in High-Entropy REO0.5F0.5BiS2 Layered Superconductor
Yoshikazu Mizuguchi, Kazuki Yamane, Ryo Matsumoto +7
Recently, robustness of superconductivity (transition temperature, Tc) under high pressures has been observed in high-entropy alloy (HEA), bcc-type Ti-Zr-Hf-Nb-Ta, and HEA-type com…
Experimental exploration of ErB and SHAP analysis on a machine-learned model of magnetocaloric materials for materials design
Kensei Terashima, Pedro Baptista de Castro, Akiko T Saito +4
Stimulated by a recent report of a giant magnetocaloric effect in HoB found via machine-learning predictions, we have explored the magnetocaloric properties of a related compou…
Glassy atomic vibrations and blurry electronic structures created by local structural disorders in high-entropy metal telluride superconductors
Yoshikazu Mizuguchi, Hidetomo Usui, Rei Kurita +10
The motivation of this work is our recent observation of the robustness of superconductivity in a High-entropy (HE) superconductor Ag0.2In0.2Sn0.2Pb0.2Bi0.2Te (CsCl-type) to extern…
Neural networks for a quick access to a digital twin of scanning physical properties measurements
Kensei Terashima, Pedro Baptista de Castro, Miren Garbiñe Esparza Echevarria +5
For performing successful measurements within limited experimental time, efficient use of preliminary data plays a crucial role. This work shows that a simple feedforward type neur…
Lattice Anharmonicity in BiS2-Based Layered Superconductor RE(O,F)BiS2 (RE = La, Ce, Pr, Nd)
Fysol Ibna Abbas, Kazuhisa Hoshi, Aichi Yamashita +9
We studied Grüneisen parameter (γG) to investigate lattice anharmonicity in a layered BiS2-based superconductor system REO1-xFxBiS2 (RE = La, Ce, Pr, Nd), where in-plane chemical p…
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…
Robustness of superconductivity to external pressure in high-entropy-alloy-type metal telluride AgInSnPbBiTe5
Md. Riad Kasem, Yuki Nakahira, Hitoshi Yamaoka +7
High-entropy-alloy (HEA) superconductors are a new class of disordered superconductors. In this study, we investigate the robustness of superconducting states in HEA-type metal tel…
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…
Crystal Growth and High-Pressure Effects of Bi-Based Superconducting Whiskers
Ryo Matsumoto, Sayaka Yamamoto, Yoshihiko Takano +1
Three growth methods were tested for producing high-transition temperature superconducting BiSrCaCuO whiskers, employing different ways to focus a co…
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…
High-pressure effects on superconducting properties and crystal structure of Bi-based layered superconductor La2O2Bi3Ag0.6Sn0.4S6
Supeng Liu, Ryo Matsumoto, Rajveer Jha +5
The effects of pressure on the superconducting properties of a Bi-based layered superconductor La2O2Bi3Ag0.6Sn0.4S6, which possesses a four-layer-type conducting layer, have been s…
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…
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…
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…
Crystal Growth of BiSrCaCuO Whiskers from Pulverized Amorphous Precursors
Ryo Matsumoto, Sayaka Yamamoto, Yoshihiko Takano +1
High-transition temperature superconducting whiskers of BiSrCaCuO were successfully grown from pulverized amorphous precursors. The obtained whiskers reve…
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…