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D-Index & Metrics

Materials Science

D-Index
43
Citations
9840
World Ranking
12221
National Ranking
767

Ryoji Funahashi publication distribution in Materials Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Materials Science in 2026. The highlighted bar marks where Ryoji Funahashi sits on this spectrum.

50–69 publications: 28 scientists 70–89 publications: 152 scientists 90–109 publications: 356 scientists 110–129 publications: 487 scientists 130–149 publications: 723 scientists 150–169 publications: 835 scientists 170–189 publications: 850 scientists 190–209 publications: 891 scientists 210–229 publications: 862 scientists 230–249 publications: 766 scientists 250–269 publications: 726 scientists 270–289 publications: 665 scientists 290–309 publications: 593 scientists 310–329 publications: 537 scientists 330–349 publications: 477 scientists 350–369 publications: 440 scientists 370–389 publications: 356 scientists 390–409 publications: 321 scientists 410–429 publications: 256 scientists 430–449 publications: 246 scientists 450–469 publications: 216 scientists 470–489 publications: 212 scientists 490–509 publications: 174 scientists 510–529 publications: 194 scientists 530–549 publications: 162 scientists 550–569 publications: 131 scientists 570–589 publications: 111 scientists 590–609 publications: 103 scientists 610–629 publications: 99 scientists 630–649 publications: 77 scientists 650–669 publications: 92 scientists 670–689 publications: 56 scientists 690–709 publications: 53 scientists 710–729 publications: 53 scientists 730–749 publications: 38 scientists 750–769 publications: 52 scientists 770–789 publications: 43 scientists 790–809 publications: 38 scientists 810–829 publications: 34 scientists 830–849 publications: 25 scientists 850–869 publications: 18 scientists 870–889 publications: 20 scientists 890–909 publications: 24 scientists 910–929 publications: 27 scientists 930–949 publications: 20 scientists 950–969 publications: 17 scientists 970–989 publications: 10 scientists 990–1,009 publications: 16 scientists 1,010–1,029 publications: 13 scientists 1,030–1,049 publications: 12 scientists 1,050–1,069 publications: 9 scientists 1,070–1,089 publications: 8 scientists 1,090–1,109 publications: 7 scientists 1,110–1,129 publications: 9 scientists 1,130–1,149 publications: 2 scientists 1,150–1,162 publications: 5 scientists 1,163+ publications: 100 scientists
50 publications 1,163+

This scientist: 252 publications — 47th percentile

47% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,163 publications or more.

Ryoji Funahashi D-index placement in Materials Science in 2026

The chart shows the D-index (discipline H-index) distribution of Materials Science scientists ranked by Research.com in 2026. The highlighted bar marks where Ryoji Funahashi sits on this spectrum.

40–41 D-Index: 211 scientists 42–43 D-Index: 450 scientists 44–45 D-Index: 612 scientists 46–47 D-Index: 612 scientists 48–49 D-Index: 598 scientists 50–51 D-Index: 657 scientists 52–53 D-Index: 667 scientists 54–55 D-Index: 621 scientists 56–57 D-Index: 597 scientists 58–59 D-Index: 610 scientists 60–61 D-Index: 587 scientists 62–63 D-Index: 606 scientists 64–65 D-Index: 533 scientists 66–67 D-Index: 490 scientists 68–69 D-Index: 469 scientists 70–71 D-Index: 378 scientists 72–73 D-Index: 421 scientists 74–75 D-Index: 359 scientists 76–77 D-Index: 323 scientists 78–79 D-Index: 299 scientists 80–81 D-Index: 230 scientists 82–83 D-Index: 210 scientists 84–85 D-Index: 195 scientists 86–87 D-Index: 203 scientists 88–89 D-Index: 175 scientists 90–91 D-Index: 175 scientists 92–93 D-Index: 142 scientists 94–95 D-Index: 121 scientists 96–97 D-Index: 117 scientists 98–99 D-Index: 107 scientists 100–101 D-Index: 88 scientists 102–103 D-Index: 85 scientists 104–105 D-Index: 68 scientists 106–107 D-Index: 62 scientists 108–109 D-Index: 57 scientists 110–111 D-Index: 45 scientists 112–113 D-Index: 49 scientists 114–115 D-Index: 50 scientists 116–117 D-Index: 34 scientists 118–119 D-Index: 38 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 29 scientists 124–125 D-Index: 28 scientists 126–127 D-Index: 24 scientists 128–129 D-Index: 33 scientists 130–131 D-Index: 28 scientists 132–133 D-Index: 21 scientists 134–135 D-Index: 20 scientists 136–137 D-Index: 23 scientists 138–139 D-Index: 17 scientists 140–141 D-Index: 12 scientists 142–143 D-Index: 17 scientists 144–145 D-Index: 21 scientists 146–147 D-Index: 13 scientists 148–149 D-Index: 11 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 13 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 4 scientists 162–163 D-Index: 4 scientists 164 D-Index: 3 scientists 165+ D-Index: 98 scientists
40 D-Index 165+

This scientist: 43 D-Index — 5th percentile

5% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 165 D-Index or more.

Overview

Ryoji Funahashi is affiliated with the National Institute of Advanced Industrial Science and Technology in Japan. Their research primarily focuses on materials science and engineering, with significant contributions to materials chemistry and electrical and electronic engineering. The scientist's work intersects several subfields including electronic, optical and magnetic materials, statistical and nonlinear physics, and mechanics of materials.

Funahashi's research topics include:

  • Advanced Thermoelectric Materials and Devices
  • Thermal Expansion and Ionic Conductivity
  • Heusler alloys: electronic and magnetic properties
  • Thermal properties of materials
  • Chalcogenide Semiconductor Thin Films
  • Perovskite Materials and Applications
  • Advanced Thermodynamics and Statistical Mechanics

The scientist has published articles in multiple peer-reviewed journals, with frequent publications appearing in:

  • Materials Today Physics
  • Journal of Electronic Materials
  • Journal of Physics Energy
  • Advanced Engineering Materials
  • Journal of Applied Physics

Notable recent papers include:

  • "Key properties of inorganic thermoelectric materials-tables (version 1)" (2022), Journal of Physics Energy
  • "Textile-Integrated ZnO-Based Thermoelectric Device Using Atomic Layer Deposition" (2020), Advanced Engineering Materials
  • "Dual-boost thermoelectric power generation in a GeTe/Mg3Sb2-based module" (2023), Materials Today Physics
  • "Advanced Thermoelectrics" (2020), Journal of Applied Physics
  • "Avoiding errors in efficiency measurements of high-performance thermoelectric generator modules: Toward best practices for materials researchers" (2023), Materials Today Physics

Funahashi has collaborated frequently with other researchers, including:

  • Yoko Matsumura
  • Tomoyuki Urata
  • Hiroyo Murakami
  • Hitomi Ikenishi
  • Robert Freer

Best Publications

  • An Oxide Single Crystal with High Thermoelectric Performance in Air

    Ryoji Funahashi;Ichiro Matsubara;Hiroshi Ikuta;Tsunehiro Takeuchi

  • Electrical and thermal properties of single-crystalline (Ca2CoO3)0.7CoO2 with a Ca3Co4O9 structure

    Masahiro Shikano;Ryoji Funahashi

  • Oxide Thermoelectric Materials: A Nanostructuring Approach

    Kunihito Koumoto;Yifeng Wang;Ruizhi Zhang;Atsuko Kosuga

  • Complex Oxide Materials for Potential Thermoelectric Applications

    Kunihito Koumoto;Ichiro Terasaki;Ryoji Funahashi

  • Oxide thermoelectrics: The challenges, progress, and outlook

    Jian He;Yufei Liu;Ryoji Funahashi

  • Thermoelectric Ceramics for Energy Harvesting

    Kunihito Koumoto;Ryoji Funahashi;Emmanuel Guilmeau;Yuzuru Miyazaki

  • Thermoelectric properties of Bi2Sr2Co2Ox polycrystalline materials

    Ryoji Funahashi;Ichiro Matsubara;Satoshi Sodeoka

  • High temperature thermoelectric properties of oxide Ca9Co12O28

    Siwen Li;Ryoji Funahashi;Ichiro Matsubara;Kazuo Ueno

  • Thermoelectrical properties of A-site substituted Ca1- xRexMnO3 system

    D. Flahaut;T. Mihara;R. Funahashi;N. Nabeshima

  • Bi2Sr2Co2Oy whiskers with high thermoelectric figure of merit

    Ryoji Funahashi;Masahiro Shikano

  • Thermoelectric properties of the Bi- and Na-substituted Ca3Co4O9 system

    Gaojie Xu;Ryoji Funahashi;Masahiro Shikano;Ichiro Matsubara

  • Synthesis and Thermoelectric Properties of the New Oxide Materials Ca3-xBixCo4O9+δ (0.0 < x < 0.75)

    Siwen Li;Ryoji Funahashi;Ichiro Matsubara;Kazuo Ueno

  • Fabrication of an all-oxide thermoelectric power generator

    Ichiro Matsubara;Ryoji Funahashi;Tomonari Takeuchi;Satoshi Sodeoka

  • Contribution of electronic structure to the large thermoelectric power in layered cobalt oxides

    Tsunehiro Takeuchi;Takeshi Kondo;Tsuyoshi Takami;Hirofumi Takahashi

  • Thermoelectric properties of Pb- and Ca-doped (Bi2Sr2O4)xCoO2 whiskers

    Ryoji Funahashi;Ichiro Matsubara

  • Ca2.7Bi0.3Co4O9∕La0.9Bi0.1NiO3 thermoelectric deviceswith high output power density

    R. Funahashi;S. Urata;K. Mizuno;T. Kouuchi

  • High-temperature transport properties of Nb and Ta substituted CaMnO3 system

    Gaojie Xu;Ryoji Funahashi;Qirong Pu;Biao Liu

  • A portable thermoelectric-power-generating module composed of oxide devices

    R. Funahashi;M. Mikami;T. Mihara;S. Urata

  • Thermoelectric properties of highly grain-aligned and densified Co-based oxide ceramics

    Yuqin Zhou;Ichiro Matsubara;Shigeru Horii;Tomonari Takeuchi

  • High-temperature thermoelectric properties of single-crystal Ca3Co2O6

    M. Mikami;R. Funahashi;M. Yoshimura;Y. Mori

Frequent Co-Authors

Ichiro Terasaki
Ichiro Terasaki Nagoya University
Mitsuru Akashi
Mitsuru Akashi Osaka University
Hajime Ohgushi
Hajime Ohgushi National Institute of Advanced Industrial Science and Technology
Hisatoshi Kobayashi
Hisatoshi Kobayashi National Institute for Materials Science
Junzo Tanaka
Junzo Tanaka Tokyo Institute of Technology
Hidetoshi Kita
Hidetoshi Kita Yamaguchi University
Takao Aoyagi
Takao Aoyagi Nihon University
Emmanuel Guilmeau
Emmanuel Guilmeau Université de Caen Normandie
Kunihito Koumoto
Kunihito Koumoto Nagoya University
Jun-ichi Shimoyama
Jun-ichi Shimoyama Aoyama Gakuin University

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