Neutron scattering study of spin-dependent quantum states in triangular antiferromagnets
| Project/Area Number |
24740223
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Condensed matter physics II
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| Research Institution | Tohoku University |
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Principal Investigator |
NAMBU Yusuke 東北大学, 多元物質科学研究所, 助教 (60579803)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Keywords | フラストレート磁性体 / 中性子散乱 / 三角格子反強磁性体 / 籠目格子反強磁性体 / 巨視的量子状態 |
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| Research Abstract |
Geometrical frustration has attracted a lot of interest because of a potential emergence of novel quantum states. To elucidate spin-dependent macroscopic quantum states, neutron scattering measurements were performed on frustrated magnets. In triangular antiferromagnets with spin-1 and 2, inelastic and polarized elastic neutron scattering measurements reveal the possible existence of magnetic quadrupole interactions. Indeed, our experimental findings cannot be explained by simple spin-spin exchange interactions. In addition, we have applied inelastic neutron scattering on spin-1/2 Kagome antiferromagnets. Through detailed study of magnetic excitations, singlet-triplet excitations and its magnetic field evolution, and renormalization of excitation energy predicted by the linear spin wave theory due to quantum effects are clarified.
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Report
(3 results)
Research Products
(41 results)
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[Journal Article] Structural and magnetic properties in the quantum S = 1/2 dimer systems Ba3(Cr1-xVx)2O8 with site disorder2013
Author(s)
T. Hong, L.Y. Zhu, X. Ke, V.O. Garlea, Y. Qiu, Y. Nambu, H. Yoshizawa, M. Zhu, G.E. Granroth, A.T. Savici, Z. Gai, and H.D. Zhou
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Journal Title
Physical Review B
Volume: 87
Issue: 14
DOI
Related Report
Peer Reviewed
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[Journal Article] Ferroauadrupolar ordering in PrTi2A1202012
Author(s)
T, J. Sato, S, Ibuka, Y, Nambu, T, Yamazaki, T. Hong, A. Sakai, S, Nakatsuji
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Journal Title
Phys. Rev. B
Volume: 86
Issue: 18
Pages: 184419-184427
DOI
Related Report
Peer Reviewed
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[Presentation] Excitations under fields of the pinwheel valence bond solid state in the Kagomé antiferromagnet Rb_2Cu_3SnF_<12>2013
Author(s)
Y. Nambu, K. Matan, Y. Zhao, T. Ono, Y. Fukumoto, A. Podlesnyak, G. Ehlers, J.W. Lynn, T.J. Sato, C. Broholm, H. Tanaka
Organizer
International Conference on Neutron Scattering 2013
Place of Presentation
Edinburgh International Conference Cnetre, Edinburgh, UK
Year and Date
2013-07-11
Related Report
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[Presentation] 籠目格子反強磁性体Rb_2Cu_3SnF_12における一重項⋅三重項励起の磁場依存性2013
Author(s)
南部雄亮, K. Matan, Y. Zhao,小野俊雄,福元好志, A. Podlesnyak, G. Ehlers, J. Lynn,佐藤卓, C. Broholm,田中秀数
Organizer
日本物理学会第68回年次大会
Place of Presentation
広島大学東広島キャンパス
Year and Date
2013-03-26
Related Report
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[Presentation] Excitations under fields of the pinwheel valence bond solid state in the Kagome antiferromagnet Rb2Cu3SnF122013
Author(s)
Y. Nambu, K. Matan, Y. Zhao, T. Ono, Y. Fukumoto, A. Podlesnyak, G. Ehlers, J.W. Lynn, T.J. Sato, C. Broholm, and H. Tanaka
Organizer
International Conference on Neutron Scattering 2013
Place of Presentation
Edinburgh International Conference Centre, United Kingdom
Related Report
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