Redistribution of Electronic Charges in Spin-Peierls State in (TMTTF)_2AsF_6 Observed by ^<13>C NMR(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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We report ^<13>C NMR spectra and nuclear spin lattice relaxation rate 1/T_1 for a quasi-one-dimensional quarter-filled organic material (TMTTF)_2AsF_6, which undergoes charge ordering (T_<CO>=102K) and spin-Peierls phase transitions (T_<SP>=14K). The ratio of two 1/T_1 for the charge accepting and donating TMTTF sites which grows from T_<CO> finally saturates in approaching T_<SP>, indicating one spin correlation function even in the charge ordered state. Below T_<SP>, however, the doubly split NMR lines from inequivalently charged molecules merge into one line, originated from the variation in charge densities. This shows that a rearrangement of the charge configuration occurs at T_<SP>.
- 一般社団法人日本物理学会の論文
- 2006-01-15
著者
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Nakamura Toshikazu
Institute For Molecular Science
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Fujiyama Shigeki
Institute for Molecular Science, Myodaiji, Okazaki, Aichi 444-8585
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