Pressure-Induced Magnetically Ordered State and Critical Phenomena in the vicinity of the phase Transition of Single-Ground-State Quantum Mangnets
Project/Area Number |
16K05414
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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 | Tokyo Institute of Technology |
Principal Investigator |
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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: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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Keywords | 基底一重項量子磁性体 / 圧力誘起量子相転移 / 磁気構造 / 臨界現象 / 磁気励起 / 基底一重項磁性体 / 高圧力 / 圧力誘起量相転移 / 磁性 / 低温物性 / 物性実験 |
Outline of Final Research Achievements |
The purpose of this study is to experimentally elucidate the magnetic structure of the pressure-induced ordered phase and the critical phenomena in the vicinity of the phase transition of singlet-ground-state magnets. We have performed high-pressure neutron diffraction measurements of CsFeCl3 and have found that a new Bragg peak appears around (1/3, 1/3, 0) at pressures above the critical pressure of ~0.9 GPa. Detailed analysis has shown that the ordered state spin configuration is a so-called 120 degree structure in the ab plane with a propagation vector of kmag=(1/3,1/3,0). The obtained critical exponent of β=0.24(1) is close to 0.253, which is the theoretically predicted value for an XY triangular-lattice antiferromagnet.
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Academic Significance and Societal Importance of the Research Achievements |
磁場誘起磁気相転移に関してはいくつかの量子磁性体を用いた実験的検証が行われ、マグノンのボース・アインシュタイン凝縮として定量的レベルで記述できることが世界的に定着している。一方、圧力誘起磁気相転移を示す量子磁性体についてはモデル物質の数が限られているのが現状である。本研究により、基底一重項量子磁性体CsFeCl3で見出された圧力誘起秩序相が磁化等のマクロ測定だけでなくミクロ測定によっても確認され、その磁気構造も決定された。単イオン異方性に起因した基底一重項磁性体として初めての物質例という学術的意義も有する。
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Report
(4 results)
Research Products
(60 results)
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[Journal Article] Triplon band splitting and edge states in the quantum dimer compound Ba2CuSi2O6Cl22018
Author(s)
K. Nawa, K. Tanaka, N. Kurita, T. J. Sato, H. Sugiyama, H. Uekusa, S. Ohira-Kawamura, K. Nakajima, S. Itoh, K. Kuwahara, and H. Tanaka
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Journal Title
Nature Communications
Volume: 印刷中
Issue: 1
DOI
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Peer Reviewed / Open Access
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[Journal Article] Unusual thermal Hall effect in a Kitaev spin liquid candidate α-RuCl32018
Author(s)
Y. Kasahara, K. Sugii, T. Ohnishi, M. Shimozawa, M. Yamashita, N. Kurita, H. Tanaka, J. Nasu, Y. Motome, T. Shibauchi, and Y. Matsuda
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Journal Title
Phys. Rev. Lett.
Volume: 120
Issue: 21
Pages: 217205-217205
DOI
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Peer Reviewed
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[Journal Article] Quasi-Two-Dimensional Bose-Einstein Condensation of Spin Triplets in Dimerized Quantum Magnet Ba2CuSi2O6Cl22016
Author(s)
M. Okada, H. Tanaka, N. Kurita, K. Johmoto, H. Uekusa, A Miyake, M. Tokunaga, S. Nishimoto, M. Nakamura, M. Jaime, G. Radtke and A. Saul
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Journal Title
Phys. Rev. B
Volume: 94
Issue: 9
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Presentation] Kitaevスピン液体における半整数量子熱ホール効果の観測2018
Author(s)
馬斯嘯, 笠原裕一, 大西隆史, 杉井かおり, 下澤雅明, 山下穣, 栗田伸之, 田中秀数, 那須譲治, 求幸年, 芝内孝禎, 松田祐司
Organizer
日本物理学会
Related Report
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[Presentation] 基底一重項磁性体CsFeCl3の圧力誘起量子相転移の中性子散乱研究2018
Author(s)
林田翔平, 萩原雅人, 松本正茂, 栗田伸之, 田中秀数, 上床美也, 伊藤晋一, 左右田稔, Tao Hong, Oksana Zaharko, 益田隆嗣
Organizer
日本物理学会
Related Report
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[Presentation] α-RuCl3のKitaevスピン液体状態におけるマヨラナカイラルエッジ電流2017
Author(s)
大西隆史, 笠原裕一, 杉井かおり, 下澤雅明, 山下穣, 常盤欣文, 栗田伸之, 田中秀数, 那須譲二, 求幸年, 芝内孝禎, 松田祐司
Organizer
日本物理学会
Related Report
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