Observation of Phase Transition with Lattice Distortion in the Low-dimensional Quantum Spin System TiOBr by Synchrotron X-ray Diffraction : Evidence of Spin-Peierls Transition?(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Prop
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概要
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Here, we report on the direct observation of lattice distortion in the new quasi-one-dimensional spin system TiOBr by X-ray diffraction experiment using synchrotoron radiation. By comparing the crystal structure between TiOBr and TiOCl, the difference in b-axis length was considered to play a key role in determining the physical properties of both systems. Using a single crystal sample of TiOBr, superlattice reflections were observed at (0, 1.5, 0) and (0, 2.5, 0). The temperature dependence of the superlattice reflections implied the first-order transition at T_<cl>=27K. We discussed the phase transition and analyzed the data using a simple dimerization model.
- 社団法人日本物理学会の論文
- 2005-08-15
著者
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Sasaki Tomoyuki
Department of Materials Science, Graduate School of Engineering, Tohoku University
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AKIMITSU Jun
Department of Physics, Aoyama Gakuin University
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MIZUMAKI Masaichiro
Japan Synchrotron Radiation Research Institute
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KATO Kenichi
Japan Synchrotron Radiation Research Institute, Spring-8
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Watabe Yasuo
Department Of Physics And Mathematics Aoyama Gakuin University
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Takata Masaki
Japan Synchrotron Radiation Research Institute (jasri):crest Japan Science And Technology Corporatio
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Takata Masaki
Japan Synchrotron Radiation Research Institute
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Akimitsu Jun
Department Of Physics And Mathematics Aoyama Gakuin University
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Mizumaki Masaichiro
Japan Synchrotron Radiation Research Institute (jasri)
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NISHIHATA Yoshiki
Department of Physics and Mathematics, Aoyama Gakuin University
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Sasaki Tomoyuki
Department Of Electrical Engineering Nagaoka University Of Technology
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Kato Kenichi
Japan Synchrotron Radiation Research Institute
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Nishihata Yoshiki
Department Of Physics And Mathematics Aoyama Gakuin University
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Sasaki Tomoyuki
Department Of Physics And Mathematics Aoyama Gakuin University
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Watabe Yasuo
Department Of Ophthalmology School Of Medicine Juntendo University
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Akimitsu Jun
Department of Physics and Mathematics, Aoyama Gakuin University
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KATO Kenichi
Japan Synchrotron Radiation Research Institute (JASRI):CREST, Japan Science and Technology Corporation (JST)
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TAKATA Masaki
Japan Synchrotron Radiation Research Institute (JASRI):CREST, Japan Science and Technology Corporation (JST)
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WATABE Yasuo
Department of Physics and Mathematics, Aoyama Gakuin University
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