発表論文

2025 / 2024 / 2023 / 2022 / 2021 / 2020 / 2019 / 2018 / 2017 / 2016 / 2015 / 2014 /
■2025年 
  1. M. Gen, D. Hirai, K. Morita, K. Nawa, S. Kogane, N. Matsuyama, T. Yajima, M. Kawamura, K. Deguchi, A. Koda, M. Kofu, S.O. Kawamura, T.J. Sato, A. Matsuo, K. Kindo, Y. Kohama, and Z. Hiroi,
    “Chemically tunable quantum magnetism on the anisotropic triangular lattice in rhenium oxyhalides,”
    Nat. Commun., in press.
  2. K. Yagi, Y. Mineno, N. Katayama, D. Hirai, and K. Takenaka,
    “Negative thermal expansion in Co3BO5 induced by ceramic microstructural effects,”
    AIP Advances, 15, 105208/1-6 (2025).
  3. A. Nichollsa, J.-R. Soh, Y. Yang, A. Bombardi, D. Hirai, H. M. Ronnow, and I. Živković,
    “Evidence of rotational and tilting disorder of ReO6 octahedra in single crystals of a 5d1 double perovskite Ba2CaReOs6,”
    J. Magn. Magn. Mater., 632, 173516/1-6 (2025).
  4. N. Iwahara, J.-R. Soh, D. Hirai, I. Živković, Y. Wei, W. Zhang, C. Galdino, T. Yu, K. Ishii, F. Pisani, O. Malanyuk, T. Schmitt, and H. M. Ronnow,
    “Persistent quantum vibronic dynamics in a 5d1 double perovskite oxide,”
    Phys. Rev. B, 112, 104104/1-7 (2025).
  5. T. Muroi, D. Hirai, H. Sagayama, T. Arima, and Z. Hiroi,
    “Magnetic field-induced tetragonal domain alignment and structural distortion in the spin-orbit-coupled insulator Ba2MgReOs6,”
    Phys. Rev. Mater, 9, 084415/1-10 (2025).
  6. O. Omar, Y. Zhang, Q. Zhang, W. Tian, E. Dagotto, G. Chen, T. Arima, M. B. Stone, A. D. Christianson, D. Hirai, and S. Gao,
    “Dipolar and quadrupolar correlations in the 5d2 Re-based double perovskites Ba2YReO6 and Ba2ScReO6,”
    Phys. Rev. B, 112, 075103/1-12 (2025).
  7. Y. Yamada, S. Kitagawa, T. Ihara, K. Ishida, N. Uematsu, D. Hirai, and K. Takenaka,
    “Uniform electronic states and s-wave superconductivity in a strongly disordered high-entropy compound X0.6Pt0.4Sb (X = Ru, Rh, Pd, Ir),”
    Phys. Rev. B, 112, L020508/1-7 (2025).
  8. Y. Muramatsu, K. Miyata, D. Hirai, and K. Takenaka,
    “High-Entropy Germanide (RuRhPdPt)1-xIrxGe: Synthesis, Phase Stability, and Transport Properties,”
    Inorg. Chem., 64, 13302?13308 (2025).
  9. K. Doi, H. Takei, Y. Shinoda, Y. Okamoto, D. Hirai, K. Takenaka, T. Matsushita, Y. Kobayashi, and Y. Shimizu,
    “Anisotropic superconducting gap probed by 125Te NMR in noncentrosymmetric Sc6MTe2 (M = Fe, Co),”
    Phys. Rev. B, 111, 214502/1-7 (2025).
  10. K. Shibuya, D. Hirai, and K. Takenaka,
    “Chemical pressure tuning of multipolar and magnetic orders in Ba2(Cd1-xCax)ReO6 double perovskites,”
    Phys. Rev. Mater., 9, 034406/1-7 (2025).
  11. M. Kawakita, F. Ikawa, K. Yagi, M. Kano, T. Kubo, Y. Yokoyama, N. Katayama, Y. Okamoto, D. Hirai, and K. Takenaka,
    “Composition evolution of crystal structure and negative thermal expansion in pyro-vanadate-phosphate Cu1.8Zn0.2V2-xPxO7,”
    Appl. Phys. Lett., 126, 091902/1-5 (2025).
  12. D. M. Nguyen, A. A. Temurjonov, D. Hirai, Z. Hiroi, O. Janson, H. Yasuoka, T. Matsushita, Y. Kobayashi, and Y. Shimizu,
    “Site-selective observation of spin dynamics of a Tomonaga-Luttinger liquid in frustrated Heisenberg chains,”
    Phys. Rev. B, 111, 064423/1-11 (2025).
  13. Y. Muramatsu, D. Hirai, M. Kawamura, S. Minami, Y. Ikeda, T. Shimada, K. Kojima, N. Katayama, and K. Takenaka,
    “Topological electronic structure and transport properties of the distorted rutile-type WO2,”
    APL Materials, 13, 011119/1-8 (2025).
  14. T. Ikenobe, T. Yamada, J.-I. Yamaura, T. Oguchi, R. Okuma, D. Hirai, H. Sagayama, Y. Okamoto, and Z. Hiroi,
    “Topological Semimetal KAlGe with Novel Electronic Instability,”
    Chem. Mater., 37, 189-197 (2025).
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■2024年 
  1. J.-R. Soh, M. E. Merkel, L. V. Pourovskii, I. Živković, O. Malanyuk, J. Pasztorova, S. Francoual, D. Hirai, A. Urru, D. Tolj, D. F. Mosca, O. V. Yazyev, N. A. Spaldin, C. Ederer, and H. M. Ronnow,
    “Spectroscopic signatures and origin of hidden order in Ba2MgReOs6,”
    Nat. Commun., 15, 10383/1-8 (2024).
  2. I. Živković, J.-R. Soh, O. Malanyuk, R. Yadav, F. Pisani, A. M. Tehrani, D. Tolj, J. Pasztorova, D. Hirai, Y. Wei, W. Zhang, C. Galdino, T. Yu, K. Ishii, A. Demuer, O. V. Yazyev, T. Schmitt, and H. M. Ronnow,
    “Dynamic Jahn-Teller effect in the strong spin-orbit coupling regime,”
    Nat. Commun., 15, 8587/1-10 (2024).
  3. D. Hirai, N. Uematsu, Y. Muramatsu, K. Deguchi, Y. Shimura, T. Onimaru, and K. Takenaka,
    “Increased superconducting transition temperature and upper critical field of a high-entropy antimonide superconductor (RuRhPdIr)???Pt?Sb,”
    Chem. Mater., 36, 9547?9556 (2024).
  4. K. Takada, J. Shibutani, K. Yagi, F. Ikawa, Y. Yokoyama, D. Hirai, Y. Okamoto, N. Katayama, Y. Umena, L. M. G. H. Chavas, T. Hatano, A. Fujita, and K. Takenaka,
    “Electric field-induced volume change in pyro-vanadate-phosphates: Toward an alternative actuator architecture,”
    Appl. Phys. Lett., 125, 041903/1-6 (2024).
  5. F. I. Frontini, G. H. J. Johnstone, N. Iwahara, P. Bhattacharyya, N. A. Bogdanov, L. Hozoi, M. H. Upton, D. M. Casa, D. Hirai, and Y.-J. Kim,
    “Spin-Orbit-Lattice Entangled State in A?MgReO? (A = Ca, Sr, Ba) Revealed by Resonant Inelastic X-Ray Scattering,”
    Phys. Rev. Lett., 133, 036501/1-6 (2024).
  6. Y. Nakayama, D. Hirai, H. Sagayama, K. Kojima, N. Katayama, J. Lehmann, Z. Wang, N. Ogawa, and K. Takenaka,
    “Odd-parity multipole order in the spin-orbit coupled metallic pyrochlore Pb?Re?O??δ,”
    Phys. Rev. Mater., 8, 055001/1-9 (2024).
  7. M. Hiraishi, H. Okabe, A. Koda, R. Kadono, T. Muroi, D. Hirai, and Z. Hiroi,
    “Nonmagnetic Ground State in RuO? Revealed by Muon Spin Rotation,”
    Phys. Rev. Lett., 132, 166702/1-6 (2024). Editors’ Suggestion
  8. D. Hirai,
    “Pinalites: Optical Properties and Quantum Magnetism of Heteroanionic A?MO?X? Compounds,”
    Inorg. Chem., 63, 4001?4010 (2024). Invited Review Article
  9. R. Kasugai, K. Takano, D. Hirai, and K. Takenaka,
    “Fabrication of metal matrix composites with negative thermal expansion zinc pyrophosphate filler,”
    Appl. Phys. Lett., 124, 021902/1-5 (2024).
  10. Y. Shinoda, Y. Okamoto, Y. Yamakawa, H. Takatsu, H. Kageyama, D. Hirai, and K. Takenaka,
    “Superconductivity in Ternary Germanide ScPdGe and Silicide ScPdSi,”
    J. Phys. Soc. Jpn., 93, 023701/1-4 (2024).
  11. M. Kofu, S. Ohira-Kawamura, N. Murai, R. Ishii, D. Hirai, H. Arima, and K. Funakoshi,
    “Magnetic boson peak in classical spin glasses,”
    Phys. Rev. Research, 6, 013006/1-9 (2024).
  12. K. Takenaka, Y. Mizuno, J. Shibutani, K. Kishida, K. Takada, K. Yagi, Y. Yokoyama, N. Katayama, Y. Okamoto, D. Hirai, T. Hatano, and A. Fujita,
    “Electroactive actuator composites using volume change induced by insulator-to-metal transition in VO?,”
    Appl. Phys. Lett., 123, 231905/1-6 (2023). Featured Articles
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■2023年 
  1. T. Ikenobe, T. Yamada, D. Hirai, H. Yamane, and Z. Hiroi,
    “Superconductivity induced by doping holes in the nodal-line semimetal NaAlGe,”
    Phys. Rev. Mater., 7, 104801/1-8 (2023).
  2. D. Hirai, N. Uematsu, K. Saitoh, N. Katayama, and K. Takenaka,
    “Superconductivity in High-Entropy Antimonide M???Pt?Sb (M = Equimolar Ru, Rh, Pd, and Ir),”
    Inorg. Chem., 62, 14207?14215 (2023).
  3. Y. Shinoda, Y. Okamoto, Y. Yamakawa, H. Matsumoto, D. Hirai, and K. Takenaka,
    “Superconductivity in Ternary Scandium Telluride Sc?MTe? with 3d, 4d, and 5d Transition Metals,”
    J. Phys. Soc. Jpn., 92, 103701/1-5 (2023). Editors’ Choice
  4. D. Hirai, T. Anbai, T. Konoike, S. Uji, Y. Hattori, T. Terashima, H. Ishikawa, K. Kindo, N. Katayama, T. Oguchi, and Z. Hiroi,
    “Fermi surface and light quasi particles in hourglass nodal chain metal β-ReO?,”
    J. Phys.: Condens. Matter, 35, 405503/1-10 (2023).
  5. S. Uji, T. Konoike, Y. Hattori, T. Terashima, T. Oguchi, T. Yamada, D. Hirai, T. Ikenobe, and Z. Hiroi,
    “Anomalous Diamagnetic Torque Signals in Topological Nodal-Line Semimetal NaAlSi,”
    J. Phys. Soc. Jpn., 92, 074703/1-8 (2023). Editors’ Choice
  6. U. Niemann, Y.-M. Wu, R. Oka, D. Hirai, Y. Wang, Y. E. Suyolcu, M. Kim, P. A. van Aken, and H. Takagi,
    “Crystallization of heavy fermions via epitaxial strain in spinel LiV?O? thin film,”
    Proc. Natl. Acad. Sci. USA, 120, e2215722120/1-6 (2023).
  7. T. Ohashi, Y. Shimizu, K. Kataoka, D. Hirai, and Z. Hiroi,
    “Nuclear Quadrupole Resonance in Kitaev Quantum Spin Liquid Candidate Ru???Os?Cl?,”
    JPS Conf. Proc., 38, 011131/1-5 (2023).
  8. H. Yamamoto, K. Tada, J. Hwang, D. Hirai, Z. Hiroi, K. Matsumoto, and R. Hagiwara,
    “Mechanism of reductive fluorination by PTFE-decomposition fluorocarbon gases for WO?,”
    Inorg. Chem., 62, 2116?2127 (2023).
  9. Y. Kubota, Y. Okamoto, T. Kanematsu, T. Yajima, D. Hirai, and K. Takenaka,
    “Large magnetic-field-induced strains in sintered chromium tellurides,”
    Appl. Phys. Lett., 122, 042404/1-6 (2023).
  10. D. Hirai, A. Fukui, H. Sagayama, T. Hasegawa, and Z. Hiroi,
    “Successive phase transitions of the spin?orbit-coupled metal Cd?Re?O? probed by high-resolution synchrotron X-ray diffraction,”
    J. Phys.: Condens. Matter, 35, 035403/1-10 (2023).
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■2022年 
  1. Y. Nakayama, Y. Okamoto, D. Hirai, and K. Takenaka,
    “Electronic Properties of Pyrochlore-Type Ca?Ir?O?,”
    J. Phys. Soc. Jpn., 91, 125002/1-2 (2022).
  2. H. Hanate, D. Hirai, Z. Hiroi, and K. Matsuhira,
    “Anisotropic magnetic phase diagram of geometrically frustrated iridate Ca?Ir?O??,”
    J. Magn. Magn. Mater., 564, 170072/1-5 (2022).
  3. S. A. Zvyagin, A. N. Ponomaryov, J. Wosnitza, D. Hirai, Z. Hiroi, M. Gen, Y. Kohama, A. Matsuo, Y. H. Matsuda, and K. Kindo,
    “Dimensional reduction and incommensurate dynamic correlations in the S = 1/2 triangular-lattice antiferromagnet Ca?ReO?Cl?,”
    Nat. Commun., 13, 6310/1-6 (2022).
  4. D. Hirai, K. Kojima, N. Katayama, M. Kawamura, D. Nishio-Hamane, and Z. Hiroi,
    “Linear Trimer Molecule Formation by Three-Center?Four-Electron Bonding in a Crystalline Solid RuP,”
    J. Am. Chem. Soc., 144, 17857?17864 (2022). Selected for cover art
  5. Y. Kitagawa, S. Takemura, D. Hirai, Z. Hiroi, J. Ueda, and S. Tanabe,
    “Characterization of the charge transfer luminescence of the [WO?]?? octahedron in Ca?WO? and the [WO?]?? square pyramid in Ca?WO?Cl?,”
    Phys. Chem. Chem. Phys., 24, 24203?24211 (2022).
  6. T. Yamada, D. Hirai, T. Ikenobe, H. Yamane, and Z. Hiroi,
    “Crystal structure and superconductivity of NaAlSi???Ge? single crystals,”
    J. Phys.: Conf. Ser., 2323, 012004 (2022).
  7. S. Uji, T. Terashima, D. Hirai, T. Anbai, and Z. Hiroi,
    “Quadrupole Fluctuation Effect on Magnetic Torque for Hourglass Dirac Loop Chain Metal β-ReO?,”
    J. Phys. Soc. Jpn., 91, 084702 (2022).
  8. T. Yamada, D. Hirai, T. Oguchi, H. Yamane, and Z. Hiroi,
    “Pseudogap Formation in the Nodal-Line Semimetal NaAlGe,”
    J. Phys. Soc. Jpn., 91, 074801 (2022).
  9. S. Uji, T. Konoike, Y. Hattori, T. Terashima, T. Oguchi, T. Yamada, D. Hirai, and Z. Hiroi,
    “Fermi surface and mass enhancement in the topological nodal-line semimetal NaAlSi,”
    Phys. Rev. B, 105, 235103 (2022).
  10. H. T. Hirose, T. Terashima, D. Hirai, Y. Matsubayashi, N. Kikugawa, D. Graf, K. Sugii, S. Sugiura, Z. Hiroi, and S. Uji,
    “Electronic states of metallic electric toroidal quadrupole order in Cd?Re?O? determined by combining quantum oscillations and electronic structure calculations,”
    Phys. Rev. B, 105, 035116 (2022).
  11. K. Kataoka, D. Hirai, A. Koda, R. Kadono, T. Honda, and Z. Hiroi,
    “Pyrochlore oxide Hg?Os?O? on verge of metal?insulator boundary,”
    J. Phys.: Condens. Matter, 34, 135602 (2022).
  12. D. Hirai, T. Ikenobe, T. Yamada, H. Yamane, and Z. Hiroi,
    “Unusual Resistive Transitions in the Nodal-Line Semimetallic Superconductor NaAlSi,” J. Phys. Soc. Jpn., 91, 024702 (2022).
  13. K. Kataoka, D. Wulferding, T. Yajima, D. Nishio-Hamane, D. Hirai, S. Lee, K.-Y. Choi, and Z. Hiroi,
    “Dimer Crystallization Induced by Elemental Substitution in the Honeycomb Lattice of Ru???Os?Cl?,” J. Phys. Soc. Jpn., 91, 014801 (2022).
  14. H. Arima, Y. Oshita, D. Hirai, Z. Hiroi, and K. Matsubayashi,
    “Interplay between Quadrupolar and Magnetic Interactions in 5d1 Double Perovskite Ba2MgReOs6 under Pressure,”
    J. Phys. Soc. Jpn., 91, 013702 (2022).
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■2021年 
  1. Structural phase transition and giant negative thermal expansion in pyrophosphate Zn2?xMgxP2O7 Y Kadowaki, R Kasugai, Y Yokoyama, N Katayama, Y Okamoto, ... Applied Physics Letters 119 (20) 2021
  2. Giant negative thermal expansion of polycrystalline Ti2O3 induced by microstructural effects Y Kadowaki, R Kasugai, Y Yokoyama, N Katayama, Y Okamoto, ... Applied Physics Letters 119 (17) 2021
  3. Pore Size Distributions Related with Spontaneous Purple Membrane Stacking in Porous Hydrogels M Karasawa, Y Yokoyama, K Takiguchi, H Takahashi, T Kikukawa, ... Journal of the Physical Society of Japan 90 (10), 103801 2021
  4. Origin and Absence of Giant Negative Thermal Expansion in Reduced and Oxidized Ca2RuO4 L Hu, Y Zhu, YW Fang, M Fukuda, T Nishikubo, Z Pan, Y Sakai, ... Chemistry of Materials 33 (19), 7665-7674 2021
  5. Superconductivity in Nb2Pd3Te5 and Chemically-Doped Ta2Pd3Te5 N Higashihara, Y Okamoto, Y Yoshikawa, Y Yamakawa, H Takatsu, ... Journal of the Physical Society of Japan 90 (6), 063705 2021
  6. Fabrication of Metal Matrix Composite Containing Manganese Nitride Showing Giant Negative Thermal Expansion by Compressive Torsion Processing K Takenaka, K Otsuka, Y Okamoto, Y Kume, M Kobashi Materials Transactions 62 (5), 590-595 2021
  7. Giant Magneto-Volume and Magneto-Caloric Effects of Frustrated Antiferromagnet Mn3GaN under Hydrostatic Pressure K Takenaka, T Sugiura, Y Kadowaki, M Ozeki, Y Okamoto, A Fujita Journal of the Physical Society of Japan 90 (4), 044601 2021
  8. ○ T. Kanematsu, Y. Okamoto, and K. Takenaka
    "Large Magnetic-Field-Induced Strain at the Magnetic Order Transition in Triangular Antiferromagnet AgCrS2"
    Applied Physics Letters 118(14) (2021) 142404 (5 pages)
  9. Thermoelectric conversion material and thermoelectric conversion element Y Okamoto, K Takenaka, T Inohara, T Wada, Y Yoshikawa US Patent 10,937,939 2021
  10. ○ Y. Yokoyama, S. Yano, R. Kurita, M. Karasawa, H. Tanaka, H. Takahashi, T. Kikukawa, M. Sonoyama, and K. Takenaka
    "Effects of Salt and Gel Network Structures on Purple Membrane Stacking in Hydrogels Immobilized with Poly(Vinyl Alcohol)"
    Journal of Applied Physics 129(01) (2021) 014701 (6 pages)
  11. ○ N. Higashihara, Y. Okamoto, Y. Yoshikawa, Y. Yamakawa, H. Takatsu, H. Kageyama, and K. Takenaka
    "Superconductivity in Nb2Pd3Te5 and Chemically-Doped Ta2Pd3Te5"
    Journal of the Physical Society of Japan 90(6) (2021) 063705 (4 pages)
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■2020年 
  1. Electrical and Thermal Transport Properties of the β-Pyrochlore Oxide CsW2O6 Y Okamoto, K Niki, R Mitoka, K Takenaka Journal of the Physical Society of Japan 89 (12), 124710 2020
  2. Annealing effects on negative thermal expansion properties of ball-milled β-Cu1. 8Zn0. 2V2O7 fine particles V Warne-Lang, M Sato, M Ozeki, Y Kadowaki, Y Yokoyama, N Katayama, ... Ceramics International 46 (17), 27655-27659 2020
  3. Large thermoelectric power factor in whisker crystals of solid solutions of the one-dimensional tellurides Ta4SiTe4 and Nb4SiTe4 Y Yoshikawa, T Wada, Y Okamoto, Y Abe, K Takenaka Applied Physics Express 2020
  4. ○ Y. Okamoto, K. Saigusa, T. Wada, Y. Yamakawa, A. Yamakage, T. Sasagawa, N. Katayama, H. Takatsu, H. Kageyama, and K. Takenaka
    "High-Mobility Carriers Induced by Chemical Doping in the Candidate Nodal-Line Semimetal CaAgP"
    Physical Review B 102(11) (2020) 115101 (6 pages)
  5. Thermal Expansion and Volume Magnetostriction in Breathing Pyrochlore Magnets LiACr4X8 (A = Ga, In, X = O, S) T Kanematsu, M Mori, Y Okamoto, T Yajima, K Takenaka Journal of the Physical Society of Japan 89 (7), 073708 2020
  6. Sol?gel synthesis of doped Cu2V2O7 fine particles showing giant negative thermal expansion M Sato, V Warne-Lang, Y Kadowaki, N Katayama, Y Okamoto, ... AIP Advances 10 (7) 2020
  7. ○ Y. Okamoto, H. Amano, N. Katayama, H. Sawa, K. Niki, R. Mitoka, H. Harima, T. Hasegawa, N. Ogita, Y. Tanaka, M. Takigawa, Y. Yokoyama, K. Takehana, Y. Imanaka, Y. Nakamura, H. Kishida, and K. Takenaka
    "Regular-Triangle Trimer and Charge Order Preserving the Anderson Condition in the Pyrochlore Structure of CsW2O6"
    Nature Communications 11 (2020) 3144 (8 pages)
  8. Ruthenium oxide having a negative thermal expansion coefficient, and useable as a thermal expansion inhibitor K Takenaka, Y Okamoto, T Shinoda, N Inoue US Patent 10,676,371 2020
  9. Annealing effect on local structure and negative thermal expansion of antiperovskite manganese nitride fine particles M Ozeki, V Warne-Lang, H Tsukasaki, Y Sakai, N Katayama, Y Okamoto, ... Applied Physics Express 13 (7), 075501 2020
  10. Real spin and pseudospin topologies in the noncentrosymmetric topological nodal-line semimetal CaAgAs HT Hirose, T Terashima, T Wada, Y Matsushita, Y Okamoto, K Takenaka, ... Physical Review B 101 (24), 245104 2020
  11. ○ K. Takenaka, M. Sato, M. Mitamura, Y. Yokoyama, N. Katayama, and Y. Okamoto
    "Spray-dry Synthesis of β-Cu1.8Zn0.2V2O7 Ceramic Fine Particles Showing Giant Negative Thermal Expansion"
    Journal of the American Ceramic Society 103(4) (2020) 2757-2753 (7 pages)
  12. Magnetization process of the breathing pyrochlore magnet in ultrahigh magnetic fields up to 150 T M Gen, Y Okamoto, M Mori, K Takenaka, Y Kohama Physical Review B 101 (5), 054434 2020
  13. Electrical and Thermal Transport Properties of the β-Pyrochlore Oxide CsW?O? O Yoshihiko, N Kenta, M Rikuto, T Koshi Journal of the Physical Society of Japan 89 (12), 124710-1-5 2020
  14. Electrical and Thermal Transport Properties of the β-Pyrochlore Oxide CsW2O6 Y OKAMOTO, K NIKI, R MITOKA, K TAKENAKA Journal of the Physical Society of Japan 89 (12), 1-124710 2020
  15. Electronic Properties of BaPtP with a Noncentrosymmetric Cubic Crystal Structure Y Okamoto, R Mizutani, Y Yamakawa, H Takatsu, H Kageyama, ... Proceedings of J-Physics 2019: International Conference on Multipole Physics … 2020
  16. Negative Thermal Expansion of beta-Cu1. 8Zn0. 2V2O7 Ceramic Fine Particles Synthesized by a Spray-Drying Method K Takenaka, M Sato, T Nishikawa, T Omura, N Yamada, Y Yokoyama, ... JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS 84 (5), 161-166 2020
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■2019年 
  1. ○ Y. Yokoyama, H. Hasegawa, Y. Mizuno, D. Asai, Y. Okamoto, H. S. Suzuki, K. Takehana, Y. Imanaka, and K. Takenaka
    "Effects of Y substitution on the electronic structure and charge dynamics of SmS"
    Physical Review B 100(24) (2019) 245143 (7 pages)
  2. Negative thermal expansion material and composite material K Takenaka, Y Okamoto, Y Yokoyama, N Katayama US Patent App. 16/433,269 2019
  3. Composite material K Takenaka, Y Okamoto, T Shinoda, M Azuma, N Inoue US Patent App. 16/473,002
  4. Superconductivity in PtSbS with a Noncentrosymmetric Cubic Crystal Structure R Mizutani, Y Okamoto, H Nagaso, Y Yamakawa, H Takatsu, ... Journal of the Physical Society of Japan 88 (9), 093709 2019
  5. Hole-doped M4SiTe4 (M= Ta, Nb) as an efficient p-type thermoelectric material for low-temperature applications Y Okamoto, Y Yoshikawa, T Wada, K Takenaka Applied Physics Letters 115 (4) 2019
  6. Valence fluctuations and giant isotropic negative thermal expansion in Sm1?xRxS (R= Y, La, Ce, Pr, Nd) D Asai, Y Mizuno, H Hasegawa, Y Yokoyama, Y Okamoto, N Katayama, ... Applied Physics Letters 114 (14)
  7. ○ K. Takenaka, D. Asai, R. Kaizu, Y. Mizuno, Y. Yokoyama, Y. Okamoto, N. Katayama, H. Suzuki, and Y. Imanaka
    "Giant Isotropic Negative Thermal Expansion in Y-doped Samarium Monosulfides by Intra-Atomic Charge Transfer"
    Scientific Reports 9 (2019) 122 (8 pages)
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■2018年 
  1. Microstructural effects on negative thermal expansion extending over a wide temperature range in β-Cu1. 8Zn0. 2V2O7 N Katayama, K Otsuka, M Mitamura, Y Yokoyama, Y Okamoto, ... Applied Physics Letters 113 (18) 2018
  2. Extended operating temperature window of giant negative thermal expansion in Sn-doped Ca2RuO4 K Takenaka, N Inoue, Y Mizuno, Y Okamoto, N Katayama, Y Sakai, ... Applied Physics Letters 113 (7)
  3. ○ K. Takenaka
    "Progress of Research in Negative Thermal Expansion Materials:
    Paradigm Shift in the Control of Thermal Expansion"
    Frontiers in Chemistry 6 (2018) 267 (13 pages) [invited]
  4. Inverse analysis of giant macroscopic negative thermal expansion of Ca2RuO4-&ITy&IT ceramics based on elasticity and structural topology optimization A Takezawa, K Takenaka, X Zhang APPLIED PHYSICS EXPRESS 11 (5)2018
  5. Large thermoelectric power factor in one-dimensional telluride Nb4SiTe4 and substituted compounds Y Okamoto, T Wada, Y Yamakawa, T Inohara, K Takenaka Applied Physics Letters 112 (17) 2018
  6. Inverse analysis of giant macroscopic negative thermal expansion of Ca2RuO4? y ceramics based on elasticity and structural topology optimization A Takezawa, K Takenaka, X Zhang Applied Physics Express 11 (5), 055801 2018
  7. Magnetic and structural properties of A-site ordered chromium spinel sulfides: alternating antiferromagnetic and ferromagnetic interactions in the breathing pyrochlore lattice Y Okamoto, M Mori, N Katayama, A Miyake, M Tokunaga, A Matsuo, ... Journal of the Physical Society of Japan 87 (3), 034709 2018
  8. Observation of Dirac-like energy band and ring-torus Fermi surface associated with the nodal line in topological insulator CaAgAs D Takane, K Nakayama, S Souma, T Wada, Y Okamoto, K Takenaka, ... npj Quantum Materials 3 (1), 1 2018
  9. Observation of Dirac-like energy band and ring-torus Fermi surface in noncentrosymmetric pnictide CaAgAs D Takane, K Nakayama, S Souma, T Wada, Y Okamoto, K Takenaka, ... APS March Meeting Abstracts 2018, Y14. 003
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■2017年 
  1. Hall effect measurements of high-quality thin films and the electronic structure T Matsumoto, T Hatano, T Urata, K Iida, K Takenaka, H Ikuta Physical Review B 96 (20), 205153
  2. PM-18Local Structure in Mn3 (Ge, Cu) N Revealed by Using Scanning/Transmission Electron Microscopy S Mori, K Takenaka, Y Ishii, K Kurushima Microscopy 66, i26-i26
  3. Giant negative thermal expansion in Fe-doped layered ruthenate ceramics K Takenaka, T Shinoda, N Inoue, Y Okamoto, N Katayama, Y Sakai, ... Applied Physics Express 10 (11), 115501
  4. “Entropics”: Science and engineering of caloric phenomena related to itinerant-electron magnetism and spin fluctuations A Fujita, K Takenaka Journal of Physics: Conference Series 868 (1), 012004
  5. Spontaneous stacking of purple membranes during immobilization with physical cross-linked poly (vinyl alcohol) hydrogel with retaining native-like functionality of … Y Yokoyama, H Tanaka, S Yano, H Takahashi, T Kikukawa, M Sonoyama, ... Journal of Applied Physics 121 (20)
  6. Large thermoelectric power factor at low temperatures in one-dimensional telluride Ta4SiTe4 T Inohara, Y Okamoto, Y Yamakawa, A Yamakage, K Takenaka Applied Physics Letters 110 (18)
  7. ○ K. Takenaka, Y. Okamoto, T. Shinoda, N. Katayama, and Y. Sakai
    "Colossal Negative Thermal Expansion in Reduced Layered Ruthenate"
    Nature Communications 8 (2017) 14102 (7 pages)
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■2016年 
  1. Y. Okamoto, T. Inohara, A. Yamakage, Y. Yamakawa, K. Takenaka "Low Carrier Density Metal Realized in Candidate Line-Node Dirac Semimetals CaAgP and CaAgAs" JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 85(12) 2016年12月 https://doi.org/10.7566/JPSJ.85.123701
  2. Synthesis and superconducting properties of a hexagonal phosphide ScRhP T Inohara, Y Okamoto, Y Yamakawa, K Takenaka Journal of the Physical Society of Japan 85 (9), 094706
  3. Thermoelectric properties of antiperovskite calcium oxides Ca3PbO and Ca3SnO Y. Okamoto, A. Sakamaki, K. Takenaka JOURNAL OF APPLIED PHYSICS 119(20) 205106 2016年5月
  4. Superconductivity in the Hexagonal Ternary Phosphide ScIrP Yoshihiko Okamoto, Takumi Inohara, Youichi Yamakawa, Ai Yamakage, Koshi Takenaka JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 85(1) 013704 2016年1月
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■2015年 
  1. Matrix-filler interfaces and physical properties of metal matrix composites with negative thermal expansion manganese nitride K Takenaka, K Kuzuoka, N Sugimoto Journal of Applied Physics 118 (8)
  2. ○ D. Matsunami, A. Fujita, K. Takenaka, and M. Kano
    "Giant Barocaloric Effect Enhanced by the Frustration of the Antiferromagnetic Phase in Mn3GaN"
    Nature Materials 14(1) (2015) 73-78.
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■2014年 
  1. Antiperovskite manganese nitride standard resistor T Oe, C Urano, N Kaneko, H Eisaki, Y Yoshida, A Yamamoto, K Takenaka IEEE Transactions on Instrumentation and Measurement 64 (6), 1446-1450
  2. Thermal expansion adjustable polymer matrix composites with giant negative thermal expansion filler K Takenaka, M Ichigo Composites science and technology 104, 47-51
  3. Stripe-induced high-temperature superconductivity in cuprates S Sugai, Y Takayanagi, J Nohara, R Shiozaki, N Hayamizu, T Muroi, ... Journal of Superconductivity and Novel Magnetism 27 (4), 941-944
  4. ○ K. Takenaka, M. Ichigo, T. Hamada, A. Ozawa, T. Shibayama, T. Inagaki, and K. Asano
    "Magnetovolume Effects in Manganese Nitrides with Antiperovskite Structure"
    Science and Technology of Advanced Materials 15(1) (2014) 015009 (11 pages)
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