Ryo Matsumoto

activity

20162026

most citedTheoretical analysis on the possibility of superconductivity in a trilayer Ruddlesden-Popper nickelate La

_{4}

_{3}

_{10}

under pressure and its experimental examination: comparison with La

_{3}

_{2}

_{7}

135 citations · 238 across the 13 of their papers we have counts for

collaborators

15 papers

physics.app-ph2026

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…

physics.app-ph2026

Wide-field NV magnetometry under simultaneous high-pressure and high-temperature conditions

Masahiro Ohkuma, Eikichi Kimura, Shumpei Ohyama +7

We demonstrate wide-field optically detected magnetic resonance (ODMR) under simultaneous high-pressure and high-temperature conditions using nitrogen-vacancy (NV) centers. Althoug…

cond-mat.supr-con2026

Probing the Meissner effect in single crystals of $B i_{2} S r_{2} C a_{2} C u_{3} O_{10 + δ}$ 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 ( $T_{c}$ ) in optimally doped Bi $_{2}$ Sr $_{2}$ Ca $_{2}$ Cu $_{3}$ O $_{10 + δ}$ (Bi-2223) single crystals…

cond-mat.mtrl-sci2025

Optically detected magnetic resonance of nitrogen-vacancy centers in microdiamonds inside nanopolycrystalline diamond anvil cell

Masahiro Ohkuma, Keigo Arai, Kenji Ohta +4

We demonstrated optically detected magnetic resonance (ODMR) of nitrogen-vacancy (NV) centers in microdiamonds inside a diamond anvil cell pressurized with nanopolycrystalline diam…

cond-mat.supr-con2025★ 1 cited

Enhancement of superconductivity on thin film of Sn under high pressure

Misaki Sasaki, Masahiro Ohkuma, Ryo Matsumoto +4

We investigated the pressure effects of a superconductivity on thin films of Sn. Elemental superconductor Sn with a body-centered tetragonal structure, $β$ -Sn, exhibits superconduc…

cond-mat.supr-con2024

High-pressure synthesis of bilayer nickelate Sr $_{3}$ Ni $_{2}$ O $_{5}$ Cl $_{2}$ with tetragonal crystal structure

Kazuki Yamane, Yoshitaka Matsushita, Shintaro Adachi +5

A novel oxychloride, Sr $_{3}$ Ni $_{2}$ O $_{5}$ Cl $_{2}$ , was synthesized for the first time under high pressure of 10 GPa at 1400 $^{\circ}$ C, motivated by a theoretical prediction of…

physics.app-ph2024

Coherent control of solid-state defect spins via patterned boron-doped diamond circuit

Masahiro Ohkuma, Eikichi Kimura, Eunsang Lee +8

Monolithic integration, which refers to the incorporation of all device functionalities within a single material, shows significant potential for creating scalable solid-state quan…

cond-mat.supr-con2024

Pressure-induced anomalous enhancement in superconducting critical temperature of transition-metal chalcogenide Ta $_{2}$ PdS $_{6}$ and Ta $_{2}$ PdSe $_{6}$

Ryo Matsumoto, Akitoshi Nakano, Takafumi D Yamamoto +5

The emergence of a second dome in the superconducting phase through pressure-driven manipulation of crystal structures in materials has attracted considerable attention. Transition…

cond-mat.supr-con2024

Investigation of superconducting gap of high-entropy telluride AgInSnPbBiTe5

Asato Seshita, Hirotaka Okabe, Riad Kasem +9

We performed transverse-field muon spin relaxation/rotation (TF-μSR) on a high-entropy-type (HE-type) superconductor AgInSnPbBiTe5. The emergence of bulk superconducting states was…

cond-mat.supr-con2024★ 8 cited

Emergence of Superconductivity at 20 K in Th $_{3}$ P $_{4}$ -type In $_{3 - x}$ S $_{4}$ Synthesized by Diamond Anvil Cell with Boron-doped Diamond Electrodes

Ryo Matsumoto, Kazuki Yamane, Terumasa Tadano +4

The exploration of superconductors in metastable phases by manipulating crystal structures through high-pressure techniques has attracted significant interest in materials science…

cond-mat.supr-con2024★ 20 cited

Phase diagram of pressure-induced high temperature superconductor La $_{3}$ Ni $_{2}$ O $_{7 + δ}$

Yuta Ueki, Hiroya Sakurai, Hibiki Nagata +7

We successfully synthesized samples of La $_{3}$ Ni $_{2}$ O $_{7 + δ}$ ( $δ = - 0.50$ , $- 0.16$ , $0.00$ , $+ 0.01$ , and $+ 0.12$ ) and measured the resistance under extremely high pressures usin…

cond-mat.supr-con2024★ 19 cited

Pressure-induced superconductivity in La $_{4}$ Ni $_{3}$ O $_{10 + δ}$ ( $δ$ = 0.04 and -0.01)

Hibiki Nagata, Hiroya Sakurai, Yuta Ueki +7

The superconducting transition temperatures, $T_{c}$ , of La $_{4}$ Ni $_{3}$ O $_{10 + δ}$ ( $δ$ = 0.04 and -0.01) were determined under various pressures up to 124.9 GPa by electr…

cond-mat.mtrl-sci2023★ 4 cited

Pressure-induced volumetric negative thermal expansion in CoZr2 superconductor

Yuto Watanabe, Hiroto Arima, Saori Kawaguchi-Imada +10

We investigate the thermal expansion and superconducting properties of a CuAl2-type (tetragonal) superconductor CoZr2 under high pressures. We perform high-pressure synchrotron X-r…

cond-mat.supr-con2023★ 135 cited

Theoretical analysis on the possibility of superconductivity in a trilayer Ruddlesden-Popper nickelate La $_{4}$ Ni $_{3}$ O $_{10}$ under pressure and its experimental examination: comparison with La $_{3}$ Ni $_{2}$ O $_{7}$

Hirofumi Sakakibara, Masayuki Ochi, Hibiki Nagata +9

We study the possibility of superconductivity in a trilayer Ruddlesden-Popper nickelate La $_{4}$ Ni $_{3}$ O $_{10}$ under pressure both theoretically and experimentally, making comparison…

cond-mat.supr-con2016★ 51 cited

Novel Diamond Anvil Cell for Electrical Measurements using Boron-doped Metallic Diamond Electrodes

R. Matsumoto, Y. Sasama, M. Fujioka +5

A novel diamond anvil cell suitable for electrical transport measurements under high pressure has been developed. A boron-doped metallic diamond film was deposited as an electrode…

Diamond quantum-sensing platform with integrated boron-doped diamond microwave antenna and thermometer

Wide-field NV magnetometry under simultaneous high-pressure and high-temperature conditions

Probing the Meissner effect in single crystals of Bi2​Sr2​Ca2​Cu3​O10+δ​ via wide-field quantum microscopy under high pressure

Optically detected magnetic resonance of nitrogen-vacancy centers in microdiamonds inside nanopolycrystalline diamond anvil cell

Enhancement of superconductivity on thin film of Sn under high pressure

High-pressure synthesis of bilayer nickelate Sr3​Ni2​O5​Cl2​ with tetragonal crystal structure

Coherent control of solid-state defect spins via patterned boron-doped diamond circuit

Pressure-induced anomalous enhancement in superconducting critical temperature of transition-metal chalcogenide Ta2​PdS6​ and Ta2​PdSe6​

Investigation of superconducting gap of high-entropy telluride AgInSnPbBiTe5

Emergence of Superconductivity at 20 K in Th3​P4​-type In3−x​S4​ Synthesized by Diamond Anvil Cell with Boron-doped Diamond Electrodes

Phase diagram of pressure-induced high temperature superconductor La3​Ni2​O7+δ​

Pressure-induced superconductivity in La4​Ni3​O10+δ​ (δ = 0.04 and -0.01)

Pressure-induced volumetric negative thermal expansion in CoZr2 superconductor

Theoretical analysis on the possibility of superconductivity in a trilayer Ruddlesden-Popper nickelate La4​Ni3​O10​ under pressure and its experimental examination: comparison with La3​Ni2​O7​

Novel Diamond Anvil Cell for Electrical Measurements using Boron-doped Metallic Diamond Electrodes

Probing the Meissner effect in single crystals of $B i_{2} S r_{2} C a_{2} C u_{3} O_{10 + δ}$ via wide-field quantum microscopy under high pressure

High-pressure synthesis of bilayer nickelate Sr $_{3}$ Ni $_{2}$ O $_{5}$ Cl $_{2}$ with tetragonal crystal structure

Pressure-induced anomalous enhancement in superconducting critical temperature of transition-metal chalcogenide Ta $_{2}$ PdS $_{6}$ and Ta $_{2}$ PdSe $_{6}$

Emergence of Superconductivity at 20 K in Th $_{3}$ P $_{4}$ -type In $_{3 - x}$ S $_{4}$ Synthesized by Diamond Anvil Cell with Boron-doped Diamond Electrodes

Phase diagram of pressure-induced high temperature superconductor La $_{3}$ Ni $_{2}$ O $_{7 + δ}$

Pressure-induced superconductivity in La $_{4}$ Ni $_{3}$ O $_{10 + δ}$ ( $δ$ = 0.04 and -0.01)

Theoretical analysis on the possibility of superconductivity in a trilayer Ruddlesden-Popper nickelate La $_{4}$ Ni $_{3}$ O $_{10}$ under pressure and its experimental examination: comparison with La $_{3}$ Ni $_{2}$ O $_{7}$