Ultra high pressure synthesis of novel rare-earth borides with cage structure and their physical properties under extremal conditions
Project/Area Number |
16K05431
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Condensed matter physics II
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Research Institution | Ibaraki University |
Principal Investigator |
Iga Fumitoshi 茨城大学, 理工学研究科(理学野), 教授 (60192473)
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Research Collaborator |
SHIMIZU katsuya
KAGAYAMA tomoko
SATO hitoshi
SATO keisuke
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Project Period (FY) |
2016-04-01 – 2019-03-31
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Project Status |
Completed (Fiscal Year 2018)
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Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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Keywords | 高圧力 / 希土類ホウ化物 / 新機能性物質開発 / 強相関電子系 / 磁性 / X線構造解析 / 超高圧合成 / 近藤半導体 / 価数揺動 / 超伝導 / 多極子 / トポロジカル物性 / 高圧合成 / 機能性物質開発 / トポロジカル絶縁体 / 金属非金属転移 / 強磁場 / 新規機能性材料開発 / 強相関系 |
Outline of Final Research Achievements |
This research purpose is to produce the novel functional rare-earth hexaborides RB6 and dodecaborides RB12, which have been studied as the various strongly correlated electron systems, by using high pressure synthesis method and to investigate their exotic physical properties. Especially our target materials were CeB12, PrB12 and TmB6. They are expected to exhibit heavy fermion feature, valence fluctuation, multipole ordering, Kondo insulating and topological properties. These compounds have been studied by non-magnetic ion substitution for such target materials. Furthermore, Ca-substituted alloying for Kondo insulator YbB12 was for the first time succeeded by high-pressure synthesis. In this alloy, the magnitude of the Kondo insulator's energy gap was found invariant for Ca-doping.
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Academic Significance and Societal Importance of the Research Achievements |
これまで作ることが難しいと考えられていた希土類ホウ化物の空白領域作製に,高圧合成手法を用いて挑戦し,SmB12,GdB12合成成功など,一定の成果を上げることができた。YB12を母合金としてCe,Pr置換も20%近くまで,23万気圧という超高圧を使用して実現させた。また高圧力を使えば,表面が金属で中は絶縁体というトポロジカル近藤絶縁体のような興味深い機能性物質の開発を推進できることが示せた。
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Report
(4 results)
Research Products
(104 results)
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[Journal Article] Kondo-like behavior near the magnetic instability in SmB6: Temperature and pressure dependences of the Sm valence2018
Author(s)
N. Emi, N. Kawamura, M. Mizumaki, T. Koyama, N. Ishimatsu, G. Pristas, T. Kagayama, K. Shimizu, Y. Osanai, F. Iga, and T. Mito
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Journal Title
Phys. Rev. B
Volume: 97
Issue: 16
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Different valence states of Tm in YB6 and YbB62017
Author(s)
H. Sato, H. Nagata, F. Iga, Y. Osanai, A. Rousuli, K. Mimura, H. Anzai, K. Ichiki, S. Ueda, T. Takabatake, A. Kondo, K. Kindo, K. Shimada, H. Namatame, M. Taniguchi
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Journal Title
Journal of Electron Spectroscopy and Related Phenomena
Volume: 印刷中
Pages: 33-36
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Temperature dependence of Yb valence in the sub-surface of YbB12(001)2017
Author(s)
K. Hagiwara, Y. Takeno, Y. Ohtsubo, R. Yukawa, M. Kobayashi, K. Horiba, H. Kumigashira, J. Rault, P. Le Fevre, F. Bertran, A. Taleb-Ibrahimi, F. Iga, S. Kimura
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Journal Title
Journal of Physics: Conference Series
Volume: 807
Pages: 012003-012003
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Hard x-ray photoemission study of Yb1-xZrxB12 : the effects of electron doping on the Kondo insulator YbB122017
Author(s)
A. Rousuli, H. Sato, F. Iga, K. Hayashi, K. Ishii, T. Wada, T. Nagasaki, K. Mimura, H. Anzai, K. Ichiki, S. Ueda, A. Kondo, K Kindo, T. Takabatake, K. Shimada, H. Namatame, M. Taniguchi
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Journal Title
Journal of Physics: Condensed Matter
Volume: 29
Issue: 26
Pages: 265601-265601
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Synchrotron Radiation Mossbauer Spectroscopy using 149Sm Nuclei2016
Author(s)
Satoshi Tsutsui, Ryo Masuda, Yasuhiro Kobayashi, Yoshitaka Yoda, Kota Mizuuchi, Yusei Shimizu, Hiroyuki Hidaka, Tatsuya Yanagisawa, Hiroshi Amitsuka, Fumitoshi Iga, and Makoto Seto
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Journal Title
Journal of the Physical Society of Japan
Volume: 85
Issue: 8
Pages: 083704-083704
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Spontaneous structural distortion of the metallic Shastry-Sutherland system DyB4 by quadrupole-spin-lattice coupling2016
Author(s)
Sim, H, Lee, S, Hong, KP, Jeong, J., Zhang, J. R., Kamiyama, T., Adroja,D. T., Murray, C. A., Thompson, S. P., Iga, F., Ji, S, Khomskii, D., Park, Je-Geun
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Journal Title
Physical Review B
Volume: 94
Issue: 19
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Surface Kondo Effect and Non-Trivial Metallic State of the Kondo Insulator YbB122016
Author(s)
K. Hagiwara, Y. Ohtsubo, M. Matsunami, S. Ideta, K. Tanaka, H. Miyazaki, J. Rault, P. Le Fevre, F. Bertran, A. Taleb-Ibrahimi, R. Yukawa, M. Kobayashi, K. Horiba, H. Kumigashira, K. Sumida, T. Okuda, F. Iga, S. Kimura
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Journal Title
Nature Communications
Volume: 7
Issue: 1
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Presentation] 白色中性子ホログラフィーによる希土類化合物での原子構造へのドープ効果の観測2019
Author(s)
大山研司, 上地昇一, 金澤雄輝, 福本陽平, 杉本和哉, 山本隆文, 八方直久, 林好一, 原田正英, 及川健一, 稲村泰弘, 松浦航, 伊賀文俊
Organizer
日本物理学会第74回年次大会(2019年)
Related Report
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[Presentation] 新規希土類12ホウ化物 (Y,R)B12 ( R = Ce, Pr, Nd ) の高圧合成と物性2019
Author(s)
伊賀文俊, 松浦航, 中山裕之, 山田貴大, 竹森氷馬, 新名亨, 入舩徹男, 西山宣正, 松尾晶, 松田康弘, 金道浩一
Organizer
日本物理学会第74回年次大会(2019年)
Related Report
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[Presentation] 近藤半導体合金Yb1-xRxB12(R=Lu, Zr, Sc, Y)の磁性・伝導・熱物性2018
Author(s)
伊賀文俊, 松浦航, 中山裕之, 横道啓政, 近藤晃弘, 松尾晶, 金道浩一, 松田康弘
Organizer
日本物理学会 2018年秋季大会
Related Report
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[Presentation] 立方晶Ce化合物における4f基底状態を反映した内殻光電子スペクトル線二色性の観測2017
Author(s)
金井惟奈, 山神光平, 藤岡修平, 濱本諭, 藤原秀紀, 木須孝幸, 田中新, 玉作賢治, 矢橋牧名, 石川哲也, 東谷篤志, 門野利治, 今田真, 伊賀文俊, 海老原孝雄, 関山明
Organizer
日本物理学会
Place of Presentation
大阪大学
Year and Date
2017-03-17
Related Report
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[Presentation] 非弾性中性子散乱によるCe0.7La0.3B6の磁気励起に関する研究2016
Author(s)
小栗真哉, 貝木隆仁, 桑原慶太郎, 伊賀文俊, 岩佐和晃, 金子耕士, 椎名亮輔, 河村聖子, 中島健次, 横尾哲也, 伊藤晋一
Organizer
日本物理学会
Place of Presentation
金沢大学
Year and Date
2016-09-13
Related Report
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[Presentation] 近藤半導体Yb1-xRxB12(R=Lu,Zr,Y)のギャップレス状態からのYbB12の近藤温度評価2016
Author(s)
横道啓省, 和田徹, 植松直之, 石井克弥, 林健人, 伊賀文俊 , 桑原慶太郎, 佐藤桂輔, 佐藤仁, 伊藤晋一 , 横尾哲也, 井深壮史, 近藤晃弘, 金道浩一
Organizer
日本物理学会
Place of Presentation
金沢大学
Year and Date
2016-09-13
Related Report
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[Presentation] 近藤絶縁体YbB12(001)表面電子状態のスピン・角度分解光電子分光2016
Author(s)
萩原健太, 大坪嘉之, 竹野祐輔, 湯川龍, 小林正起, 堀場弘司, 組頭広志, 角田一樹, 奥田太一, 伊賀文俊, 木村真一
Organizer
日本物理学会
Place of Presentation
金沢大学
Year and Date
2016-09-13
Related Report
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[Presentation] 強相関希土類化合物の希土類 3dおよび4f光電子スペクトル線二色性による異方的4f電荷分布の観測2016
Author(s)
金井惟奈, 森健雄, 内免翔, 山神光平, 藤岡修平, 藤原秀紀, 東谷篤志, 門野利治, 今田真, 木須孝幸, 田中新, 室隆桂之, 玉作賢治, 矢橋牧名, 石川哲也, 伊賀文俊, 海老原孝雄, 本多史憲, 大貫惇睦, 関山明
Organizer
日本物理学会
Place of Presentation
金沢大学
Year and Date
2016-09-13
Related Report
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