Ryota Gemma

710 total citations
40 papers, 563 citations indexed

About

Ryota Gemma is a scholar working on Materials Chemistry, Mechanics of Materials and Mechanical Engineering. According to data from OpenAlex, Ryota Gemma has authored 40 papers receiving a total of 563 indexed citations (citations by other indexed papers that have themselves been cited), including 31 papers in Materials Chemistry, 24 papers in Mechanics of Materials and 10 papers in Mechanical Engineering. Recurrent topics in Ryota Gemma's work include Metal and Thin Film Mechanics (13 papers), Hydrogen Storage and Materials (11 papers) and Muon and positron interactions and applications (11 papers). Ryota Gemma is often cited by papers focused on Metal and Thin Film Mechanics (13 papers), Hydrogen Storage and Materials (11 papers) and Muon and positron interactions and applications (11 papers). Ryota Gemma collaborates with scholars based in Germany, Czechia and Japan. Ryota Gemma's co-authors include R. Kirchheim, Astrid Pundt, Talaát Al-Kassab, Martin Vlach, S. Daniš, E. Tal-Gutelmacher, I. Procházka, Jakub Čı́žek, W. Anwand and G. Bräuer and has published in prestigious journals such as Journal of Applied Physics, Physical Review B and Acta Materialia.

In The Last Decade

Ryota Gemma

40 papers receiving 541 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Ryota Gemma Germany 15 407 190 177 135 134 40 563
Urban Jelvestam Sweden 8 379 0.9× 153 0.8× 80 0.5× 83 0.6× 208 1.6× 12 573
Hyosim Kim United States 15 638 1.6× 203 1.1× 98 0.6× 95 0.7× 36 0.3× 51 738
C. Haut France 12 481 1.2× 302 1.6× 103 0.6× 282 2.1× 166 1.2× 35 736
Eryang Lu China 16 481 1.2× 206 1.1× 193 1.1× 125 0.9× 39 0.3× 54 669
M.C. Hash United States 11 448 1.1× 235 1.2× 164 0.9× 75 0.6× 46 0.3× 32 730
Caian Qiu United States 17 367 0.9× 518 2.7× 114 0.6× 74 0.5× 58 0.4× 30 708
J. von Pezold Germany 13 584 1.4× 460 2.4× 121 0.7× 110 0.8× 163 1.2× 16 762
H.Q. Ye China 13 525 1.3× 478 2.5× 93 0.5× 182 1.3× 32 0.2× 20 774
Cunfeng Yao China 17 507 1.2× 225 1.2× 150 0.8× 151 1.1× 42 0.3× 79 742
H. Yoshioka Japan 16 411 1.0× 248 1.3× 173 1.0× 161 1.2× 70 0.5× 23 650

Countries citing papers authored by Ryota Gemma

Since Specialization
Citations

This map shows the geographic impact of Ryota Gemma's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ryota Gemma with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ryota Gemma more than expected).

Fields of papers citing papers by Ryota Gemma

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ryota Gemma. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ryota Gemma. The network helps show where Ryota Gemma may publish in the future.

Co-authorship network of co-authors of Ryota Gemma

This figure shows the co-authorship network connecting the top 25 collaborators of Ryota Gemma. A scholar is included among the top collaborators of Ryota Gemma based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ryota Gemma. Ryota Gemma is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Boll, Torben, et al.. (2022). Role of atomic hydrogen supply on the onset of CO2 methanation over La–Ni based hydrogen storage alloys studied by in-situ approach. International Journal of Hydrogen Energy. 47(44). 19051–19061. 3 indexed citations
2.
Gemma, Ryota, Yanshan Lu, Sascha Seils, Torben Boll, & Kohta Asano. (2021). Chemical characterization of Mg0.25Mn0.75-H(D) nanocomposites by Atom Probe Tomography (APT). Journal of Alloys and Compounds. 896. 163015–163015. 2 indexed citations
3.
Gemma, Ryota, Moritz to Baben, Astrid Pundt, Vassilios Kapaklis, & Bjørgvin Hjörvarsson. (2020). The impact of nanoscale compositional variation on the properties of amorphous alloys. Repository KITopen (Karlsruhe Institute of Technology). 6 indexed citations
4.
Wagner, Stefan, Martin Deutges, M. Martín, et al.. (2019). Relationship between hydrogen embrittlement and Md30 temperature: Prediction of low-nickel austenitic stainless steel's resistance. International Journal of Hydrogen Energy. 44(45). 25064–25075. 34 indexed citations
5.
Gemma, Ryota, et al.. (2019). Methanation of CO<sub>2</sub> by using LaNi<sub>5</sub> alloy with ball-milling method. Journal of Advanced Science. 31(0). n/a–n/a. 2 indexed citations
6.
Gemma, Ryota, et al.. (2018). Mechanical Composition Control for Ti-Based Hydrogen Storage Alloys. e-Journal of Surface Science and Nanotechnology. 16(0). 298–301. 7 indexed citations
7.
Gemma, Ryota, et al.. (2017). Laser-Induced Reversion of δ′ precipitates in an Al-Li Alloy. Microscopy and Microanalysis. 23(S1). 628–630. 1 indexed citations
8.
Vlach, Martin, Jakub Čı́žek, Oksana Melikhova, et al.. (2015). Early Stages of Precipitation Process in Al-(Mn-)Sc-Zr Alloy Characterized by Positron Annihilation. Metallurgical and Materials Transactions A. 46(4). 1556–1564. 14 indexed citations
9.
Hruška, Petr, Jakub Čı́žek, Patrik Dobroň, et al.. (2015). Investigation of nanocrystalline Gd films loaded with hydrogen. Journal of Alloys and Compounds. 645. S308–S311. 5 indexed citations
10.
Vlach, Martin, Ivana Stulíková, Bohumil Smola, et al.. (2013). Precipitation in cold-rolled Al–Sc–Zr and Al–Mn–Sc–Zr alloys prepared by powder metallurgy. Materials Characterization. 86. 59–68. 44 indexed citations
11.
Čı́žek, Jakub, Oksana Melikhova, Marián Vlček, et al.. (2013). Hydrogen Interaction with Defects in Nanocrystalline, Polycrystalline and Epitaxial Pd Films. Journal of nano research. 26. 123–133. 4 indexed citations
12.
Vlach, Martin, Ivana Stulíková, Bohumil Smola, et al.. (2012). Effect of cold rolling on precipitation processes in Al–Mn–Sc–Zr alloy. Materials Science and Engineering A. 548. 27–32. 34 indexed citations
13.
Gemma, Ryota, et al.. (2011). Glow discharge optical emission spectroscopy for accurate and well resolved analysis of coatings and thin films. Thin Solid Films. 520(5). 1660–1667. 47 indexed citations
14.
Tal-Gutelmacher, E., Ryota Gemma, Astrid Pundt, & R. Kirchheim. (2010). Hydrogen behavior in nanocrystalline titanium thin films. Acta Materialia. 58(8). 3042–3049. 24 indexed citations
15.
Procházka, I., Martin Vlach, Patrik Dobroň, et al.. (2009). Multi-scale analysis of hydrogen-induced buckling in Pd films. Procedia Engineering. 1(1). 99–103. 7 indexed citations
16.
Čı́žek, Jakub, I. Procházka, S. Daniš, et al.. (2009). Hydrogen-vacancy complexes in electron-irradiated niobium. Physical Review B. 79(5). 25 indexed citations
17.
Gemma, Ryota, Talaát Al-Kassab, R. Kirchheim, & Astrid Pundt. (2008). APT analyses of deuterium-loaded Fe/V multi-layered films. Ultramicroscopy. 109(5). 631–636. 30 indexed citations
18.
Semboshi, Satoshi, Talaát Al-Kassab, Ryota Gemma, & R. Kirchheim. (2008). Microstructural evolution of Cu-1at% Ti alloy aged in a hydrogen atmosphere and its relation with the electrical conductivity. Ultramicroscopy. 109(5). 593–598. 35 indexed citations
19.
Procházka, I., S. Daniš, Oksana Melikhova, et al.. (2007). Positron annihilation study of hydrogen trapping at open-volume defects: Comparison of nanocrystalline and epitaxial Nb thin films. Journal of Alloys and Compounds. 446-447. 484–488. 6 indexed citations
20.
Gemma, Ryota, Talaát Al-Kassab, R. Kirchheim, & Astrid Pundt. (2007). Studies on hydrogen loaded V–Fe8at% films on Al2O3 substrate. Journal of Alloys and Compounds. 446-447. 534–538. 9 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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