13C NMR MEASUREMENTS OF THE HIGH-MAGNETIC-FIELD, LOW-TEMPERATURE PHASES OF(TMTTF)2PF6
13C NMR MEASUREMENTS OF THE HIGH-MAGNETIC-FIELD, LOW-TEMPERATURE PHASES OF(TMTTF)2PF6
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(TMTTF)2PF6 高磁场、低温相的 13C NMR 测量
DOI：
10.1103/physrevlett.80.5429
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发表时间：
1998
影响因子：
8.6
通讯作者：
W. Moulton
中科院分区：
文献类型：
--
作者：
Stuart E. Brown;W. Clark;F. Zámborszky;B. Klemme;G. Kriza;B. Alavi;C. Merlic;P. Kuhns;W. Moulton
我们报道了c13−标记的TMTTF分子在高磁场中的核磁共振光谱，建立了（TMTTF） 2pf6的场-温相图。（TMTTF） 2 - PF 6的交错磁化分量比CuGeO 3大得多。在I相中，（TMTTF） 2 - PF 6的交错磁化分量比CuGeO 3大得多。在接近从高温到D相的转变时，我们观察到核磁共振谱的不寻常的拓宽，这可能来自外部来源，并与单个链中孤子样激发的钉住有关。
We report NMR spectroscopy of C 13− labeled TMTTF molecules in high-magnetic fields that established the field-temperature phase diagram for (TMTTF) 2 PF 6. The dimerized spin-Peierls (D) ground state is driven to an incommensurate (I) phase for fields B> B c= 19.1±0.1 T. In the I phase, the staggered component of the magnetization is much larger for (TMTTF) 2 PF 6 than it is for CuGeO 3. On approaching the transition to the D phase from higher temperatures, we observe an unusual broadening of the NMR spectrum which is probably from extrinsic sources and related to pinning of solitonlike excitations in individual chains.