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Kitou S, Fujii T, Kawamoto T, Katayama N, Maki S, Nishibori E, Sugimoto K, Takata M, Nakamura T, Sawa H. Successive Dimensional Transition in (TMTTF)_{2}PF_{6} Revealed by Synchrotron X-ray Diffraction. PHYSICAL REVIEW LETTERS 2017; 119:065701. [PMID: 28949642 DOI: 10.1103/physrevlett.119.065701] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Indexed: 06/07/2023]
Abstract
A quasi-one-dimensional organic charge-transfer salt (TMTTF)_{2}PF_{6} undergoes a multistep phase transition as the temperature decreases. One of these transitions is called a "structureless transition," and these detailed structures were unknown for many years. With synchrotron x-ray diffraction, we observed a slight structural difference owing to the effect of charge-order transition between two TMTTF molecules in a dimer, which corresponds to the charge transfer δ_{CO}=0.20e. The two-dimensional Wigner crystallization was determined from an electron density analysis using core differential Fourier synthesis. Furthermore, we found that the ground state due to tetramerization, called the spin Peierls phase, is a three-dimensional transition with interchain correlation.
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Affiliation(s)
- Shunsuke Kitou
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
| | - Tatsuya Fujii
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
| | - Tadashi Kawamoto
- Department of Materials Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Naoyuki Katayama
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
| | - Sachiko Maki
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
| | - Eiji Nishibori
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
| | - Kunihisa Sugimoto
- Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, Hyogo 679-5198, Japan
| | - Masaki Takata
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | | | - Hiroshi Sawa
- Department of Applied Physics, Nagoya University, Nagoya 464-8603, Japan
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Theoretical Studies on Phase Transitions in Quasi-One-Dimensional Molecular Conductors. CRYSTALS 2012. [DOI: 10.3390/cryst2030996] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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