Investigation of spin liquid state near the quantum critical point by high-pressure measurements of quantum kagome lattice antiferromagnets
| Project/Area Number |
22540348
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Kobe University |
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Principal Investigator |
OKUBO Susumu 神戸大学, 分子フォトサイエンス研究センター, 助教 (80283901)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2010: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 磁性 / フラストレーション / 量子相転移 / 圧力下測定 / スピン液体 / カゴメ格子 / スピンフラストレーション |
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| Research Abstract |
To investigate spin-liquid state stability for Dzyaloshinski-Moriya (DM) interaction (antisymmetric exchange interaction), magnetic susceptibility measurements of quantum kagome antiferromagnets ZnCu_3(OH)_6Cl_2 (Herbertsmithite) and Cu_3V_2O_7(OH)_2・2H_2O (Volborthite) have been performed under high-pressure at low temperature. Quantum transition from spin-liquid state to Neel state in these systems cannot observed in high-pressure up to 7.9 kbar at low temperature down to 1.8 K. On the other hand, D terms of DM interaction in quantum-spin kagome like antiferromagnet Cu_2O(SO_4) (Dolerophanite), classical-spin kagome lattice antiferromagnet KCr_3(SO_4)_2(OH_6) (Cr-jarosite) and spin-liquid ground state honeycomb lattice antiferromagnet Bi_3Mn_4O_12(NO_3) have been estimated using high-frequency ESR measurements.
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Report
(4 results)
Research Products
(33 results)
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[Journal Article] Antiferromagnetic ordering in Sr_2CrO_42013
Author(s)
M. Rani, H. Sakurai, S. Okubo, K. Takamoto, R. Nakata, T. Sakurai, H. Ohta, A. Matsuo, Y. Kohama, K. Kindo, J. Ahmad
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Journal Title
J. Phys.: Cond. Mat
Volume: 25
Issue: 22
Pages: 226001-5
DOI
Related Report
Peer Reviewed
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[Presentation] 蜂の巣格子反強磁性体のテラヘルツ光ESR 測定2012
Author(s)
大久保晋, 和田秀雄, 張衛民, 櫻井敬博, 太田仁, 冨田崇弘, 藤澤真士, 菊池彦光
Organizer
兵庫県立大学大学院・物質理学研究科「フロンティア機能物質創製センター」シンポジウム
Place of Presentation
フロンティア機能物質創製センター (招待)
Year and Date
2012-12-22
Related Report
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[Presentation] Origin of Field Induced Magnetic Ordering in Frustrated Honeycomb Lattice Antiferromagnet2012
Author(s)
S. Okubo, T. Ueda, W. Zhang, T. Sakurai, M. Fujisawa, H. Ohta, N. Ohnishi, M. Azuma, Y. Shimakawa, N. Kumada
Organizer
19th International Conference on Magnetism
Place of Presentation
Busan, Korea
Related Report
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[Presentation] Spin Dynamics of Frustrated Honeycomb Lattice Antiferromagnet2011
Author(s)
S. Okubo, Y. Yu, W. Zhang, T. Sakurai, M. Fujisawa, H. Ohta, H. Kikuchi, N. Ohnishi, M. Azuma, Y. Shimakawa, and N. Kumada
Organizer
26th International Conference on Low Temperature Physics
Place of Presentation
Beijing International Convention Center, China (invite)
Related Report
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[Presentation] Multi frequency ESR measurements of S=3/2 honeycomb lattice antiferromagnet Bi_3Mn_4O_12(NO_3)2010
Author(s)
S. Okubo, Y. Yu, W. Zhang, M. Fujisawa, T. Sakurai, H. Ohta, N. Ohishi, M. Azuma, Y. Shimakawa, N. Kumada
Organizer
The 5th International Conference on Highly Frustrated Magnetism 2010
Place of Presentation
John Hopkins University, Baltimore, USA (poster)
Related Report
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