Nobuyuki Ōkuma

3.1k total citations · 2 hit papers
27 papers, 2.2k citations indexed

About

Nobuyuki Ōkuma is a scholar working on Atomic and Molecular Physics, and Optics, Statistical and Nonlinear Physics and Condensed Matter Physics. According to data from OpenAlex, Nobuyuki Ōkuma has authored 27 papers receiving a total of 2.2k indexed citations (citations by other indexed papers that have themselves been cited), including 23 papers in Atomic and Molecular Physics, and Optics, 6 papers in Statistical and Nonlinear Physics and 5 papers in Condensed Matter Physics. Recurrent topics in Nobuyuki Ōkuma's work include Topological Materials and Phenomena (18 papers), Quantum Mechanics and Non-Hermitian Physics (13 papers) and Quantum many-body systems (6 papers). Nobuyuki Ōkuma is often cited by papers focused on Topological Materials and Phenomena (18 papers), Quantum Mechanics and Non-Hermitian Physics (13 papers) and Quantum many-body systems (6 papers). Nobuyuki Ōkuma collaborates with scholars based in Japan and United States. Nobuyuki Ōkuma's co-authors include Masatoshi Sato, Kohei Kawabata, Ken Shiozaki, Yuh Fukai, Y. Sakamoto, K. Watanabe, Yasunori Hayashi, Daichi Nakamura, Kentaro Nomura and Masaru Tomita and has published in prestigious journals such as Physical Review Letters, PLoS ONE and Scripta Materialia.

In The Last Decade

Nobuyuki Ōkuma

25 papers receiving 2.2k citations

Hit Papers

Topological Origin of Non-Hermitian Skin Effects 2020 2026 2022 2024 2020 2022 250 500 750
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Topological Origin of Non-Hermitian Skin Effects
    2020 824 citations Nobuyuki Ōkuma, Kohei Kawabata et al. Physical Review Letters profile →
  2. Non-Hermitian Topological Phenomena: A Review
    2022 206 citations Nobuyuki Ōkuma, Masatoshi Sato profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Nobuyuki Ōkuma Japan 15 1.6k 878 547 147 136 27 2.2k
Xian-Geng Zhao China 24 1.1k 0.7× 156 0.2× 797 1.5× 5 0.0× 161 1.2× 125 1.9k
Tran Trung Luu Switzerland 15 2.4k 1.5× 47 0.1× 165 0.3× 37 0.3× 34 0.3× 34 2.6k
T. R. Waite United States 9 518 0.3× 143 0.2× 491 0.9× 16 0.1× 118 0.9× 16 1.3k
N. Flytzanis Greece 17 665 0.4× 475 0.5× 265 0.5× 3 0.0× 225 1.7× 57 1.1k
Jean‐Bernard Maillet France 20 293 0.2× 50 0.1× 700 1.3× 16 0.1× 52 0.4× 66 1.2k
Zhonglong Zhao China 26 572 0.3× 1.2k 1.4× 675 1.2× 494 3.6× 97 2.4k
Robert Kusche Germany 5 643 0.4× 343 0.4× 495 0.9× 1 0.0× 139 1.0× 6 1.2k
N. M. Chtchelkatchev Russia 21 998 0.6× 114 0.1× 570 1.0× 2 0.0× 777 5.7× 123 1.7k
Herbert Wagner Germany 9 302 0.2× 71 0.1× 330 0.6× 6 0.0× 308 2.3× 16 728
Matteo Baggioli China 22 617 0.4× 243 0.3× 362 0.7× 242 1.8× 90 1.5k

Countries citing papers authored by Nobuyuki Ōkuma

Since Specialization
Citations

This map shows the geographic impact of Nobuyuki Ōkuma'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 Nobuyuki Ōkuma with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Nobuyuki Ōkuma more than expected).

Fields of papers citing papers by Nobuyuki Ōkuma

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Nobuyuki Ōkuma. 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 Nobuyuki Ōkuma. The network helps show where Nobuyuki Ōkuma may publish in the future.

Co-authorship network of co-authors of Nobuyuki Ōkuma

This figure shows the co-authorship network connecting the top 25 collaborators of Nobuyuki Ōkuma. A scholar is included among the top collaborators of Nobuyuki Ōkuma 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 Nobuyuki Ōkuma. Nobuyuki Ōkuma 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.
Mizoguchi, Tomonari & Nobuyuki Ōkuma. (2024). On Equivalence of Two Formulas of Orbital Magnetic Susceptibility for Tight-binding Models. Journal of the Physical Society of Japan. 93(9).
2.
3.
Ōkuma, Nobuyuki, et al.. (2024). Topological enhancement of nonnormality in non-Hermitian skin effects. Physical review. B.. 109(14). 15 indexed citations
4.
Ōkuma, Nobuyuki & Tomonari Mizoguchi. (2023). Relationship between two-particle topology and fractional Chern insulator. Physical Review Research. 5(1). 5 indexed citations
5.
Nakamura, Daichi, et al.. (2023). Universal Platform of Point-Gap Topological Phases from Topological Materials. Physical Review Letters. 131(25). 256602–256602. 22 indexed citations
6.
7.
Ōkuma, Nobuyuki & Yuya O. Nakagawa. (2022). Nonnormal Hamiltonian dynamics in quantum systems and its realization on quantum computers. Physical review. B.. 105(5). 8 indexed citations
8.
Ōkuma, Nobuyuki & Masatoshi Sato. (2022). Non-Hermitian topological phenomena: A review. arXiv (Cornell University).
9.
Ōkuma, Nobuyuki & Masatoshi Sato. (2021). Quantum anomaly, non-Hermitian skin effects, and entanglement entropy in open systems. Physical review. B.. 103(8). 59 indexed citations
10.
Ōkuma, Nobuyuki, Kohei Kawabata, Ken Shiozaki, & Masatoshi Sato. (2020). Topological Origin of Non-Hermitian Skin Effects. Physical Review Letters. 124(8). 86801–86801. 824 indexed citations breakdown →
11.
Ōkuma, Nobuyuki & Masatoshi Sato. (2020). Hermitian zero modes protected by nonnormality: Application of pseudospectra. Physical review. B.. 102(1). 41 indexed citations
12.
Ōkuma, Nobuyuki & Masatoshi Sato. (2019). Topological Phase Transition Driven by Infinitesimal Instability: Majorana Fermions in Non-Hermitian Spintronics. Physical Review Letters. 123(9). 97701–97701. 104 indexed citations
13.
14.
Ōkuma, Nobuyuki. (2018). Quantum Theory of Antiferromagnetic Opto-spintronics: Reciprocal and Nonreciprocal Magnons Coupled with Polarized Photons. 1 indexed citations
15.
Ōkuma, Nobuyuki. (2017). Magnon Spin-Momentum Locking: Various Spin Vortices and Dirac magnons in Noncollinear Antiferromagnets. Physical Review Letters. 119(10). 107205–107205. 43 indexed citations
16.
Ōkuma, Nobuyuki, Makiko Saita, Noriyuki Hoshi, et al.. (2017). Effect of masticatory stimulation on the quantity and quality of saliva and the salivary metabolomic profile. PLoS ONE. 12(8). e0183109–e0183109. 34 indexed citations
17.
Ōkuma, Nobuyuki & Kentaro Nomura. (2017). Microscopic derivation of magnon spin current in a topological insulator/ferromagnet heterostructure. Physical review. B.. 95(11). 13 indexed citations
18.
Ōkuma, Nobuyuki & Masao Ogata. (2016). Unconventional spin Hall effect and axial current generation in a Dirac semimetal. Physical review. B.. 93(14). 4 indexed citations
19.
Watanabe, K., Nobuyuki Ōkuma, Yuh Fukai, Y. Sakamoto, & Yasunori Hayashi. (1996). Superabundant vacancies and enhanced diffusion in Pd-Rh alloys under high hydrogen pressures. Scripta Materialia. 34(4). 551–557. 54 indexed citations
20.
Fukai, Yuh & Nobuyuki Ōkuma. (1993). Evidence of Copious Vacancy Formation in Ni and Pd under a High Hydrogen Pressure. Japanese Journal of Applied Physics. 32(9A). L1256–L1256. 218 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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