Reexamination of ^<13>C-NMR in (TMTTF)_2AsF_6: Comparison with infrared spectroscopy
Reexamination of ^<13>C-NMR in (TMTTF)_2AsF_6: Comparison with infrared spectroscopy
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(TMTTF)_2AsF_6中的^ 13 C-NMR的复查：与红外光谱的比较
DOI：
10.1103/physrevb.81.205107
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
and K. Yakushi
中科院分区：
文献类型：
--
作者：
S. Hirose;A. Kawamoto;N. Matsunaga;K. Nomura;K. Yamamoto;and K. Yakushi
电荷序态（CO）可以通过核磁共振（NMR）和红外光谱等微探针测量来观察。我们使用红外光谱检查并证实了在以前的核磁共振研究中看到的CO跃迁。然而，我们发现电荷歧化的程度小于核磁共振的分析结果，并且在低温下没有观察到核磁共振预测的自旋佩尔跃迁下电荷密度的重新分布。我们估计自旋歧化的程度为0.11从以前的核磁共振研究的核磁共振位移分析。这种小的歧化不需要在低温下重新分配电荷密度。核磁共振观察到的富电荷和贫电荷分子位的不同行为可以通过相应的反铁磁涨落的贡献来检验。
The charge order (CO) state can be observed by microprobe measurements such as nuclear magnetic resonance (NMR) and infrared spectroscopy. We used the infrared spectroscopy to examineand confirmed the CO transition seen in previous-NMR studies. However we found the degree of charge disproportionation,, to be smaller than that obtained from the analysis ofin-NMR and the redistribution of charge density below spin Peierls transition predicted by-NMR was not observed at low temperature. We estimated the degree of spin disproportionation to be 0.11 from the analysis of the NMR shift in previous NMR studies. This small disproportionation does not require the redistribution of charge density at low temperature. The different behaviors ofat charge-rich and charge-poor molecular sites observed by-NMR can be examined by the contribution of the commensurate antiferromagnetic fluctuation with.