Understanding of chiral material properties based on quantification of crystal chirality
| Project/Area Number |
16K05449
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | The University of Tokyo (2017-2018)
Osaka University (2016) |
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Principal Investigator |
KIMURA KENTA 東京大学, 大学院新領域創成科学研究科, 助教 (70586817)
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| Research Collaborator |
AKAKI mitsuru
HAGIWARA masayuki
MIYAKE atsushi
TOKUNAGA masashi
YAMAUCHI kunihiko
TOYODA masayuki
KIMURA shojiro
KATO yasuyuki
MOTOME yukitoshi
KIMURA tsuyoshi
ASAKA toru
URUSHIBARA daisuke
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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 |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | カイラリティ / ドメイン / 旋光度 / 電気磁気効果 / 単結晶 / 旋光性 / 非相反電気磁気光学効果 / 物性実験 / 強相関電子系 |
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| Outline of Final Research Achievements |
The purpose of this study was to achieve a quantitative understanding of chirality driven phenomena by introducing a concept of "chirality strength" that quantifies the chirality (handedness) of the crystal structure. We have successfully synthesized single crystals of isostructural chiral materials whose chirality strength can be tuned by a chemical substitution. We have found that the occurrence frequency of mono- or multi-chiral domains in these materials are clearly correlated with the chirality strength. We have also revealed that the temperature dependence of the chirality strength and an optical rotatory strength is correlated near a so-called gyrotropic structural transition, in which the chirality strength can be regarded as an order parameter. Moreover, we have demonstrated that the chiral materials discovered in this study are highly interesting systems in terms of their magnetoelectric properties, and obtained various results that exceed expectations.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の主な成果は、結晶構造のカイラリティ（右手系と左手系）の度合いを定量的に表す「カイラリティ強度」なる概念を導入することで、カイラリティが関与する現象を定量的に理解できることを実際に示した点である。これにより、カイラリティ強度を「強磁性体における磁化」のような秩序パラメータとして位置づける研究が活発化すると期待され、カイラリティ関連物性の巨大化や新規機能の予測といった展開が見込まれる点で学術的意義を持つ。
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Report
(4 results)
Research Products
(39 results)
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[Journal Article] Magnetic structural unit with convex geometry: A building block hosting an exchange-striction-driven magnetoelectric coupling2018
Author(s)
Kenta Kimura, Yasuyuki Kato, Kunihiko Yamauchi, Atsushi Miyake, Masashi Tokunaga, Akira Matsuo, Koichi Kindo, Mitsuru Akaki, Masayuki Hagiwara, Shojiro Kimura, Masayuki Toyoda, Yukitoshi Motome, and Tsuyoshi Kimura
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Journal Title
Phys. Rev. Mater.
Volume: 2
Issue: 10
Pages: 104415-104415
DOI
Related Report
Peer Reviewed / Int'l Joint Research
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[Journal Article] Frustrated magnetism in the Heisenberg pyrochlore antiferromagnets AYb2X4 (A = Cd, Mg, X = S, Se)2017
Author(s)
Tomoya Higo, Kensuke Iritani, Mario Halim, Wataru Higemoto, Takashi U. Ito, Kentaro Kuga, Kenta Kimura, Satoru Nakatsuji
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Journal Title
Physical Review B
Volume: 95
Issue: 17
DOI
Related Report
Peer Reviewed
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[Journal Article] Magnetoelectric Behavior from the S=1/2 Asymmetric Square Cupolas2017
Author(s)
Y. Kato, K. Kimura, A. Miyake, M. Tokunaga, A. Matsuo, K. Kindo, M. Akaki, M. Hagiwara, M. Sera, T. Kimura, and Y. Motome
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Journal Title
Phys. Rev. Lett
Volume: 118
Issue: 10
Pages: 1076011-5
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[Journal Article] Magnetodielectric detection of magnetic quadrupole order in Ba(TiO)Cu4(PO4)4 with Cu4O12 square cupolas2016
Author(s)
K. Kimura, P. Babkevich, M. Sera, M. Toyoda, K. Yamauchi, G. S. Tucker, J. Martius, T. Fennell, P. Manuel, D. D. Khalyavin, R. D. Johnson, T. Nakano, Y. Nozue, H. M. Ronnow, T. Kimura
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Journal Title
Nat. Commun.
Volume: 7
Issue: 1
Pages: 130391-7
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Presentation] 正四角台塔型反強磁性体A(TiO)Cu4(PO4)4 (A = Ba, Sr, Pbの磁気相図と電気磁気結合2019
Author(s)
木村健太, 勝吉司, 三宅厚志, 徳永将史, 松尾晶, 金道浩一, 赤木暢, 萩原政幸, 木村尚次郎, 木村剛
Organizer
日本物理学会第74回年次大会
Related Report
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[Presentation] 正四角台塔系における磁気秩序の多極子分解と電気磁気応答2017
Author(s)
加藤康之, 木村健太, 三宅厚志, 徳永将史, 松尾晶, 金道浩一, 赤木暢, 萩原政幸, 世良正一, 木村剛, 求幸年
Organizer
日本物理学会第72回年次大会
Place of Presentation
大阪大学（大阪府・豊中市）
Year and Date
2017-03-17
Related Report
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[Presentation] S=1/2正方晶カイラル反強磁性体A(TiO)Cu4(PO4)4 (A = Ba, Sr)の強磁場中物性2016
Author(s)
世良正一, 木村健太, 赤木暢, 萩原政幸, 三宅厚志, 徳永将史, 松尾晶, 金道浩一, 中野岳仁, 野末泰夫, 木村剛
Organizer
日本物理学会2016年秋季大会
Place of Presentation
金沢大学（石川県・金沢市）
Year and Date
2016-09-13
Related Report
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[Presentation] 反強磁性カイラル正四角台塔系(A(TiO)Cu4(PO4)4(A=Ba, Sr))の磁化曲線と電気磁気効果2016
Author(s)
加藤康之, 木村健太, 三宅厚志, 徳永将史, 松尾晶, 金道浩一, 赤木暢, 萩原政幸, 世良正一, 木村剛, 求幸年
Organizer
日本物理学会2016年秋季大会
Place of Presentation
金沢大学（石川県・金沢市）
Year and Date
2016-09-13
Related Report
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[Presentation] Magnetoelectric Behavior from Asymmetric Unit and Chiral Twist in Antiferromagnetic Square Cupolas2016
Author(s)
Y. Kato, K. Kimura, A. Miyake, M. Tokunaga, A. Matsuo, K. Kindo, M. Akaki, M. Hagiwara, M. Sera, T. Kimura, Y. Motome
Organizer
Highly Frustrated Magnetism 2016
Place of Presentation
Taipei (Taiwan)
Year and Date
2016-09-07
Related Report
Int'l Joint Research
