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Presentations before March 2022 (International, Okamoto)
33. Large Magnetic-Field-Induced Strain
in Geometrically Frustrated Sulfides,
Yoshihiko Okamoto, Tomoya Kanematsu, Masaki Mori, and Koshi Takenaka,
International Conference on Quantum Liquid Crystals 2021 (QLC2021), Online,
Japan, May 13th, 2021. (oral)
32. Superconductivity in One-Dimensional
Tellurides Nb2Pd3Te5 and Chemically-Doped Ta2Pd3Te5,
Yoshihiko Okamoto, Naoya Higashihara, Yuma Yoshikawa, Youichi Yamakawa,
Hiroshi Takatsu, Hiroshi Kageyama, and Koshi Takenaka,
International Conference on Quantum Liquid Crystals 2021 (QLC2021), Online,
Japan, May 11th, 2021. (poster)
31. One-Dimensional Telluride Ta4SiTe4 as an
Efficient Thermoelectric Material for Low-Temperature Applications,
Yoshihiko Okamoto,
14th Asia-Pacific
Physics Conference 2019, Kuching, Malaysia, November 18th, 2019. (invited)
30. Equilateral-Triangular Trimer
Formation in β-Pyrochlore Oxide CsW2O6,
Yoshihiko Okamoto, Rikuto Mitoka, Kenta Niki, Haruki Amano, Naoyuki
Katayama, Hiroshi Sawa, Hisatomo Harima, and Koshi Takenaka,
International Conference on Strongly Correlated Electron Systems 2019, Okayama, Japan,
September 24th, 2019. (oral)
29. Superconductivity in PtSbS with
Noncentrosymmetric and Cubic Crystal Structure,
Yoshihiko Okamoto,
J-Physics 2019 International Conference &
KINKEN-WAKATE 2019 Multipole Physics, Kobe, Japan,
September 19th, 2019. (invited)
28. Exploration of Novel Transition Metal Compounds Based on the
Unique Crystal and Electronic Structures
Yoshihiko Okamoto
Research Frontier of Advanced Spectroscopies for Correlated Electron Systems,
Sendai, Japan, June 13th, 2019. (invited)
27. A-Site Ordered Cr Spinel Sulfides: Alternating Antiferromagnetic
and Ferromagnetic Interactions in the Breathing Pyrochlore
Lattice,
Yoshihiko Okamoto
The 2nd Asia-Pacific Workshop on Quantum Magnetism, Bangalore,
India, December 6th, 2018. (invited)
26.
Calcium Silver Pnictide as a Candidate Nodal-Line Semimetal,
Yoshihiko Okamoto,
The 2nd TMS-PKU Alliance Workshop on Topological Materials and
Quantum Materials, Beijing, China, September 25th, 2018. (invited)
25.
Crystal Growth of 5d Transition Metal Compounds: β-Pyrochlore
Oxide CsW2O6 and One-Dimensional Telluride Ta4SiTe4,
Yoshihiko Okamoto,
International Workshop on New Materials and Crystal Growth, Awaji,
Hyogo, Japan, June 29th, 2018. (invited)
24.
Superconductivity in the Noncentrosymmetric Iridium Phosphide
ScIrP,
Yoshihiko Okamoto,
International Symposium on Superconductivity 2017, Tokyo, Japan,
December 14th, 2017. (invited)
23.
One-Dimensional Telluride Ta4SiTe4 as a High-Performance
Thermoelectric Material,
Yoshihiko Okamoto, Taichi Wada, Yuma Yoshikawa, Takumi
Inohara, Youichi Yamakawa, Ai Yamakage, and Koshi Takenaka,
The 6th Toyota RIKEN International Workshop 2017, Nagoya, Japan,
November 11th, 2017. (oral)
22.
Phase Transition in β-Pyrochlore Oxide CsW2O6,
Yoshihiko Okamoto, Haruki Amano, Kenta Niki, Rikuto Mitoka,
Naoyuki Katayama, Hiroshi Sawa, Yuto Nakamura, Hideo Kishida, and
Koshi Takenaka,
International Workshop on Multipole Physics and Related Phenomena,
Hachimantai, Japan, September 28th, 2017. (oral)
21.
High-Field Magnetization of Spin-3/2 Breathing Pyrochlore
Antiferromagnets,
Yoshihiko Okamoto, Masaki Mori, Atsushi Miyake, Masashi
Tokunaga, Akira Matsuo, Koichi Kindo, Zenji Hiroi, and Koshi
Takenaka,
Highly Frustrated Magnetism 2016, Taipei, Taiwan, September 8th,
2016. (poster)
20.
Superconductivity in the Noncentrosymmetric Iridium Phosphide
ScIrP,
Yoshihiko Okamoto,
Dalian EMN Meeting, Dalian, China, July 27th, 2016. (invited)
19.
Geometrical Frustration and Bond Alternation on the Breathing
Pyrochlore Lattice,
Yoshihiko Okamoto,
OIST International Workshop on Novel Quantum Materials and
Physics, Okinawa, Japan, May 15th, 2014. (invited)
18.
Breathing Pyrochlore Lattice Realized in the A-Site Ordered
Spinel Oxides LiGaCr4O8 and LiInCr4O8,
Yoshihiko Okamoto,
2014 APS March Meeting, Denver, United States, March 3rd, 2014. (invited)
17.
Magnetic Properties of the Spin-1/2 Kagome Antiferromagnets:
Vesignieite BaCu3V2O8(OH)2 and CdCu3(OH)6Br2,
Yoshihiko Okamoto, Makoto Yoshida, Hajime Ishikawa, Gøran
J. Nilsen, Hiroyuki Yoshida, and Zenji Hiroi,
International Conference on Magnetism 2012, Busan, Korea, July
2012. (poster)
16.
Structural and Magnetic Properties of Breathing Pyrochlore
Lattice Antiferromagnets LiGaCr4O8 and LiInCr4O8,
Yoshihiko Okamoto, Gøran J. Nilsen, J. Paul
Attfield, and Zenji Hiroi,
4th International Symposium on Structure-Property Relationship in
Solid State Materials, Bordeaux, France, June 2012. (poster)
15.
Magnetization Plateaus in Spin-1/2 Kagome Antiferromagnets:
Volborthite and Vesignieite,
Yoshihiko Okamoto, Hiroyuki Yoshida, Masashi Tokunaga and
Zenji Hiroi
International Conference on Frustration in Condensed Matter,
Sendai, Japan, January 2011. (oral)
14.
Heavy-Mass Fermi Liquid Realized in a Frustrated Itinerant-Electron
Antiferromagnet "YMn2Zn20",
Yoshihiko Okamoto, Takeshi Shimizu, Jun-ichi Yamaura, Yoko
Kiuchi and Zenji Hiroi
Highly Frustrated Magnetism 2010, Baltimore, United States,
August 2010. (poster)
13.
Discontinuous Lifshitz Transition Induced by Filling Control in
NaxCoO2,
Yoshihiko Okamoto, Atsushi Nishio, Yoko Kiuchi and Zenji
Hiroi
9th International Conference on Materials and Mechanisms on
Superconductivity, Tokyo, Japan, September 2009. (poster)
12.
Vesignieite BaCu3V2O8(OH)2 as a candidate spin-1/2 kagome
antiferromagnet,
Yoshihiko Okamoto, Hiroyuki Yoshida and Zenji Hiroi
International Conference on Magnetism 2009, Karlsruhe, Germany,
July 2009. (oral)
11.
Thermoelectric Co and Rh oxides: NaxCoO2 and LiRh2O4,
Yoshihiko Okamoto,
Lorentz Center Workshop on Spin Caloritronics, Leiden,
Netherlands, February 11th, 2009. (invited)
10.
Synthesis and superconducting properties of iron oxyarsenide
superconductors,
Yoshihiko Okamoto, Yuto Tsukamoto and Zenji Hiroi,
International Symposium on Anomalous Quantum Materials 2008,
Tokyo, Japan, November 2008. (poster)
9.
S = 1/2 kagome lattice in Cu2+-containing minerals,
Yoshihiko Okamoto, Hiroyuki Yoshida and Zenji Hiroi,
Highly Frustrated Magnetism 2008, Braunschweig, Germany,
September 2008. (poster)
(Best Poster Award)
8.
Precise control of the Na nonstoichiometry in NaxCoO2
Yoshihiko Okamoto, Atsushi Nishio, Daisuke Yoshizumi, Yoko
Kiuchi, Masaki Ichihara and Zenji Hiroi,
2008 APS March Meeting, New Orleans, United States, March 2008. (oral)
7.
New Ir and Rh oxides with spinel-related structures, Na4Ir3O8 and
LiRh2O4,
Yoshihiko Okamoto, Seiji Niitaka, Ayako Yamamoto, Minoru
Nohara, Masaya Uchida, Shinichi Shamoto, Hiroyuki Mitamura,
Hiroko Aruga-Katori, Hiroshi Sawa, Akira Sekiyama, Shigetada Suga
and Hidenori Takagi,
Kyoto Conference on Solid State Chemistry, Kyoto, Japan, November
2006. (poster)
6.
Spin liquid state in Na4Ir3O8,
Yoshihiko Okamoto, Minoru Nohara and Hidenori Takagi,
Highly Frustrated Magnetism 2006, Itami, Japan, August 2006. (poster)
5.
Spin liquid state in Na4Ir3O8,
Yoshihiko Okamoto, Minoru Nohara and Hidenori Takagi,
International Symposium on Anomalous Quantum Materials 2006,
Okinawa, Japan, May 2006. (poster)
4.
Layered rhodium oxide SrxRh2O4 as a thermoelectric material,
Yoshihiko Okamoto, Minoru Nohara and Hidenori Takagi,
The 5th Korea-Japan-Taiwan Symposium on Strongly Correlated
Electron Systems, Busan, Korea, December 2004.(poster)
3.
Na-ion ordering and charge disproportionation in Na0.3CoO2,
Yoshihiko Okamoto, Masaya Uchida, Minoru Nohara and
Hidenori Takagi,
International Workshop on Novel Quantum Phenomena in Transition
Metal Oxides, Sendai, Japan, November 2004.(poster)
2.
Layered rhodium oxide SrxRh2O4 as a thermoelectric material,
Yoshihiko Okamoto, Minoru Nohara, and Hidenori Takagi,
IFCAM workshop on Electronic Properties of Cobalt Oxides, Sendai,
Japan, June 2004.(oral)
1.
Novel approach toward high-performance thermoelectric materials,
Yoshihiko Okamoto, Tomoko Eguchi, Fumiko Sakai, Minoru
Nohara, Hidenori Takagi and Koichi Kitazawa,
CERC-ERATO 2002 International Workshop on "Phase Control of
Correlated Electron System", Waikoloa, Hawaii, USA, May 2002.
(poster)