High Field ESR Study of BaCu_2(Si_<1-x>Ge_x)_2O_7 Single Crystal
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概要
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Recent advance of a field theoretical approach of a low-temperature electron spin resonance (ESR) in S=1/2 antiferromagnetic chain, which has Dzyaloshinskii-Moriya (DM) interactions and staggered g-tensor sites, by Oshikawa and Affleck (OA) suggests peculiar magnetic field dependence of ESR. Although BaCu_2(Si_<1-x>Ge_x)_2O_7 is an antiferromagnetic chain system with mixed antiferromagnetic and ferromagnetic interchain interactions, we found that x=0.65 substance shows the peculiar field dependence of ESR predicted by OA theory. The temperature dependence of the line width showed the power-law dependence and strong field dependence in the gapless spinon regime which can be well interpreted by OA theory. The temperature dependence of the resonance shift turned out to he also consistent with OA theory. These results are also discussed in connection with Cu-Benzoate which is considered as a model substance of OA theory.
- 理論物理学刊行会の論文
- 2002-06-28
著者
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広井 善二
京都大学化学研究所
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OKUBO Susumu
Molecular Photoscience Research Center, Kobe University
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OHTA Hitoshi
Molecular Photoscience Research Center, Kobe University
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KUNIMOTO Takashi
Department of Nano Material and Bio Engineering, Tokushima Bunri University
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Kunimoto Takashi
The Department Of Electrical And Electronic Engineering Tottori University:(present Address)venture
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広井 善二
Institute For Solid State Physics University Of Tokyo
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KUNIMOTO Takashi
Venture Business Laboratory, Kobe University
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Hiroi Zenji
Institute For Chemical Research Kyoto University
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Okubo S
Molecular Photoscience Research Center Kobe University:venture Business Laboratory Kobe University
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Okubo Susumu
Institute For Materials Research Tohoku University
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Kunimoto T
Department Of Nano Material And Bio Engineering Tokushima Bunri University
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Kunimoto Takashi
Depanment Of Physics Faculty Of Science Science University Of Tokyo
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KAWAKAMI Kanji
The Graduate School of Science and Technology, Kobe University
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INAGAKI Yuji
The Graduate School of Science and Technology, Kobe University
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HIROI Zenji
ISSP, University of Tokyo
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Inagaki Y
Department Of Applied Quantum Physics And Nuclear Engineering Faculty Of Engineering Kyushu Universi
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Ohta Hitoshi
Molecular Photoscience Research Center Kobe University
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Hiroi Z
Univ. Tokyo Kashiwa Jpn
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Okubo Susumu
Department Of Physics And Astronomy University Of Rochester
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Inagaki Yuji
Department Of Physics Kyushu University
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OKUBO Susumu
Venture Business Laboratory, Kobe University:Molecular Photoscience Research Center, Kobe University
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Okubo Susumu
Molecular Photoscience Research Center and Department of Physics, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
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Ohta Hitoshi
Molecular Photoscience Research Center and Department of Physics, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
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