38.    Crystalline water intercalation into the Kitaev honeycomb cobaltate Na2Co2TeO6

Masaaki Ito, Yuya Haraguchi*, Teruki Motohashi, Miwa Saito, Satoshi Ogawa, Takashi Ikuta, and Hiroko Aruga Katori

Physical Review Materials, 9, 094402 (2025)

arXiv:2508.08717

37.   Frustrated J1-J2 diamond lattice antiferromagnet Co2Ti3O8 with a vacancy-ordered spinel structure synthesized via a topochemical reaction

Rio Kumeda, Yuya Haraguchi*, Daisuke Nishio-Hamane, Akira Matsuo, Koichi Kindo, and Hiroko Aruga Katori 

Journal of the Physical Society of Japan, 94, 084701 (2025).

arXiv:2506.05099

36.    One-third magnetization plateau in a spin-1 kagome magnet BaNi3(AsO4)2(OH)2

Yuya Haraguchi*, Jun-ichi Yamaura, Akira Matsuo, Koichi Kindo, Hiroko Aruga Katori

Physical Review Materials 9, 054408 (2025).

arXiv: 2505.05747

35.    Polymorphism and magnetism in a Kitaev honeycomb cobaltate KCoAsO4

Yuya Haraguchi*, Daisuke Nishio-Hamane, Hiroko Aruga Katori

Scientific Reports 15, 2624 (2025).

arXiv:2501.05146

34.    CaCo2TeO6: A topochemically prepared 3d7 honeycomb Kitaev magnet

Yuya Haraguchi*, Yuto Yoshida, Akira Matsuo, Koichi Kindo, Hiroko Aruga Katori

Physical Review B, 110, 184411 (2024)

arXiv: 2410.22604

33.   Molecular Orbital Electronic Instability in a van der Waals Kagome Semiconductor Nb3Cl8: Exploring Future Directions

Yuya Haraguchi*, and Kazuyoshi Yoshimura

Journal of the Physical Society of Japan, 93, 111002 (2024)

arXiv: 2407.19457

32.   Magnetic ordering of the Mo3O8-type cluster Mott insulator Na3Sc2(MoO4)2Mo3O8 with spin-1/2 triangular lattice prepared via optimal synthesis 

Yuya Haraguchi*, Daigo Ishikita, and Hiroko Aruga Katori 

Physical Review Materials, 8, 084409 (2024)

arXiv: 2407.20493

31.   Charge fluctuations in a cluster Mott state: Hard x-ray photoemission study on a breathing kagome magnet Nb3Cl8 

R. Nakamura, D. Takegami, K. Fujinuma, M. Nakamura, M. Ferreira-Carvalho, A. Melendez-Sans, M. Yoshimura, K. -D. Tsuei, Y. Haraguchi, H. Katori, L. H. Tjeng, and T. Mizokawa*

Physical Review B, 110, L081109 (2024)

30.   High-temperature magnetic anomaly via suppression of antisite disorder through synthesis route modification in a Kitaev candidate Cu2IrO3

Yuya Haraguchi*, Daisuke Nishio-Hamane, Akira Matsuo, Koichi Kindo, and Hiroko Aruga Katori

Journal of Physics: Condensed Matter, 36, 405801 (2024).

arXiv: 2406.01925

29.   Impact of oxidation state on the valence-bond glass physics in the lithium-intercalated Mo3O8 cluster Mott insulators

Daigo Ishikita, Yuya Haraguchi*, Hiroko Aruga Katori

Physical Review B,  109, 024405 (2024).

arXiv: 2312.11342

28.   Magnetic Ordering in the Jeff = 0 Nickelate NiRh2O4 prepared via a solid-state metathesis

Yuya Haraguchi*, Daisuke Nishio-Hamane, Hiroko Aruga Katori

Physical Review Materials, 7, 084413 (2023).

arXiv:2308.11172

27.   Magnetic field induced valence change in Eu(Co1-xNix)2P2 up to 60 T

Raito Nakamura, Azumi Ishita, Jin Nakamura, Hiroto Ohta, Yuya Haraguchi, Hiroko Aruga Katori, Hajime Ishikawa, Akira Matsuo, Koichi Kindo, Minoru Nohara, Akihiko Ikeda*

Physical Review B, 107, 235110 (2023)

arXiv:2303.02910

26.  Monoclinic distortion in the hyperhoneycomb Kitaev material β-ZnIrO3 revealed by improved sample quality

Yuya Haraguchi*,  Hiroko Aruga Katori

Chemistry Letters, 52, 404-407 (2023).

arxiv:2310.14236

25.  Perfect kagome-lattice antiferromagnets with Jeff= 1/2: The Co2+-analogs of copper minerals volborthite and vesignieite

Yuya Haraguchi*, Takehiro Ohnoda, Akira Matsuo, Koichi Kindo,  Hiroko Aruga Katori

Physical Review B, 106, 214421 (2022)

arXiv:2212.03486

24.  Improvement of optical transmittance of SiO2 surface by femtosecond-laser-induced homogeneous nanostructure formation

Minami Edakubo, Lukas Janos Richter, Yuya Haraguchi, Hiroko Aruga-Katori, Jürgen Ihlemann, Godai Miyaji*

Optical Materials Express, 12, 3982-3989 (2022).

23.  Honeycomb lattice iridate on the verge of Mott-collapse

Yuya Haraguchi*,  Hiroko Aruga Katori

Journal of Physics: Condensed Matter, 34, 465602 (2022).

arXiv:2209.01861

22. Observation of topological flat bands in the kagome semiconductor Nb3Cl8

Zhenyu Sun, Hui Zhou, Cuixiang Wang, Shiv Kumar, Daiyu Geng, Shaosheng Yue, Xin Han, Yuya Haraguchi, Kenya Shimada, Peng Cheng, Lan Chen, Youguo Shi, Kehui Wu, Sheng Meng, Baojie Feng*

Nano Letters, 22, 4596 (2022).

arXiv:2111.01583

21. Sinusoidal Magnetic Structure of Andalusite-Type AlxFe2-xGeO5 with x = 0.09 and 0.15

Kazuo Kakimoto, Hiroho Ohta, Yuya Haraguchi, Masato Hagihala, Shuki Torii, Takashi Kamiyama, Hiroko Aruga Katori*

Journal of the Physical Society of Japan 91, 054707 (2022).

20.  Magnetism of AlxFe2-xGeO5 with Andalusite structure

Kazuo Kakimoto, Saki Takada, Hiroto Ohta, Yuya Haraguchi, Masato Hagihala, Shuki Torii, Takashi Kamiyama, Hiroki Mitamura, Masashi Tokunaga, Atsushi Hatakeyama, Hiroko Aruga Katori*

Journal of the Physical Society of Japan 91 , 054704 (2022)

cond-mat arXiv:2202.01491

19. Formation of the metastable iron(III) germanate Fe2GeO5 through kinetic control of the oxidative reaction

Kazuo Kakimoto, Yoshiaki Ohki, Saki Takada, Yuya Haraguchi, Ayako Yamamoto, Hiroko Aruga Katori*

Chemistry Letters 51, 451-454 (2022). 

18. Spin glass transition in the spin-orbit-entangled Jeff = 0 Mott insulating double-perovskite ruthenate

Hayato Yatsuzuka, Yuya Haraguchi*, Akira Matsuo, Koichi Kindo, Hiroko Aruga Katori

Scientific Reports 12, 2429 (2022).  

17.  Quantum paramagnetism in the hyperhoneycomb Kitaev magnet β-ZnIrO3

Yuya Haraguchi*, Arika Matsuo, Koichi Kindo, Hiroko Aruga Katori

Physical Review Materials  6, L021401 (2022).

cond-mat arXiv:2201.10119

16.  Magnetic properties of Eu(Co1−xNix)2P2 

R. Nakamura, H. Ohta, Y. Kobayashi, Y. Haraguchi, H. Aruga Katori, J. Nakamura*

Journal of the Physical Society of Japan 91, 024701 (2022).

15.  Quantum antiferromagnet bluebellite comprising a maple-leaf lattice made of spin-1/2 Cu2+ ions

Yuya Haraguchi*, Akira Matsuo, Koichi Kindo, Zenji Hiroi

Physical Review B 104, 174439 (2021)

cond-mat arXiv:2111.09514

14.  Metallic state in the vicinity of molecular orbital crystallization in the d1 thiospinel ZnTi2S4 prepared via a reductive ion-exchange reaction

Yuya Haraguchi*,  Hiroki Arikai, Hiroko Aruga Katori

Journal of Physics: Condensed Matter 33, 395603 (2021)

cond-mat arXiv:2107.05488

13. 4d3  Ru5+ triangular lattice antiferromagnets: layered rock-salt β-Li3Mg2RuO6 and ion-exchanged delafossite Ag3Mg2RuO6

Yuya Haraguchi*,  Kazuo Kakimoto, Hiroko Aruga Katori

Journal of Solid State Chemistry 299, 122171 (2021).

12. Strong antiferromagnetic interaction owing to a large trigonal distortion in the spin-orbit-coupled honeycomb lattice iridate CdIrO3

Yuya Haraguchi*,  Hiroko Aruga Katori

Physical Review Materials 4, 044401 (2020)

cond-mat arXiv:2003.07531

11. Frustrated magnetism in the J1-J2 honeycomb lattice compounds MgMnO3 and ZnMnO3 synthesized via a metathesis reaction

Yuya Haraguchi*, Kazuhiro Nawa*, Chishiro Michioka, Hiroaki Ueda, Akira Matsuo, Koichi Kindo, Maxim Avdeev, Taku J. Sato, Kazuyoshi Yoshimura

Physical Review Materials 3, 124406 (2019)

10. Frustrated magnetism of the maple-leaf-lattice antiferromagnet MgMn3O7·3H2O

Yuya Haraguchi*, Akira Matsuo, Koichi Kindo, Zenji Hiroi

Physical Review B 98, 064412 (2018)

cond-mat arXiv:1808.02664

9. Magnetic ordering with an XY-like anisotropy in the honeycomb lattice iridates ZnIrO3 and MgIrO3 synthesized via a metathesis reaction

Yuya Haraguchi*, Chishiro Michioka,  Akira Matsuo, Koichi Kindo, Hiroaki Ueda, Kazuyoshi Yoshimura*

Physical Review Materials 2, 054411 (2018)

cond-mat  arXiv:1807.06273

8. Internal Magnetic Field on the Two-Dimensional Triangular Lattice Formed by Mo3O8 Trimers

Jun Sugiyama*, Hiroshi Nozaki, Izumi Umegaki, Yuya Haraguchi, Chishiro Michioka, Hiroaki Ueda, Kazuyoshi Yoshimura, Yasmine Sassa, Ola Kenji Forslund, Daniel Andreica, Tatsuo Goko, Alex Amato, Martin Månsson

JPS Conference Proceedings 21, 011012 (2018)

7. Highly Spin-frustrated Magnetism in the Topochemically Prepared Triangular Lattice Cluster Magnets Na3A2(MoO4)2Mo3O8 (A = In, Sc)

Yuya Haraguchi*, Chishiro Michioka, Hiroaki Ueda, Kazuyoshi Yoshimura

Chemistry – A European Journal 23, 15879-15883 (2017) 

6. Magnetic-nonmagnetic Phase Transition with Interlayer Charge Disproportionation of Nb3 Trimers in the Cluster Compound Nb3Cl8

Yuya Haraguchi*, Chishiro Michioka, Manabu Ishikawa, Yoshiaki Nakano, Hideki Yamochi, Hiroaki Ueda, Kazuyoshi Yoshimura

Inorganic Chemistry 56, 3483-3488 (2017)

5. Charge fluctuation in S = 1/2 triangular lattice cluster antiferromagnets Li2ScMo3O8 and Li2InMo3O8

Yuya Haraguchi*, Chishiro Michioka, Hiroaki Ueda, Kazuyoshi Yoshimura* 

Journal of Physics: Conference Series 868, 012022 (2017)

4. Physical properties in the cluster-based magnetic-diluted triangular lattice antiferromagnets Li2Sc1-xSnxMo3O8

Yuya Haraguchi*, Chishiro Michioka, Hiroaki Ueda, Akira Matsuo, Koichi Kindo Kazuyoshi Yoshimura*

Journal of Physics: Conference Series 828, 012013 (2017)

3. Tetramer spin singlet instability in the fluorine-substituted pyrochlore superconducting system Cd2Re2O7-xFx

Yuya Haraguchi*, Chishiro Michioka, Hiroaki Ueda, Kazuyoshi Yoshimura*

Journal of Physics: Condensed Matter 28, 355602 (2016)

2. Spin-liquid behavior in the spin-frustrated Mo3 cluster magnet Li2ScMo3O8 in contrast to magnetic ordering in isomorphic Li2InMo3O8

Yuya Haraguchi*, Chishiro Michioka*, Masaki Imai, Hiroaki Ueda, Kazuyoshi Yoshimura

Physical Review B 92, 014409 (2015)  

1. ​Unconventional multicritical point in the S = 1/2 Re2-cluster magnet La3Re2O10

Yuya Haraguchi, Chishiro Michioka, Hiroaki Ueda, Kazuyoshi Yoshimura*

Physical Review B 90, 064403 (2014) 

日本語総説

キタエフ系層状コバルト酸化物におけるトポケミカル物質改変を利用した磁性制御 

原口祐哉

日本結晶学会誌 67(2) 75-76 (2025).

低温イオン交換を用いた新しいキタエフ物質の開発―固体化学の立場から見えてきたキタエフスピン液体の実現指針― 

原口祐哉、香取浩子、道岡千城、植田浩明、吉村一良

固体物理 No.11 Vol.57 (2022)