Solitons in Polyacetylene Produced and Probed by Positive Muons
Solitons in Polyacetylene Produced and Probed by Positive Muons
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DOI：
10.1103/physrevlett.53.1763
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发表时间：
1984-10
影响因子：
8.6
通讯作者：
K. Nagamine;K. Ishida;T. Matsuzaki;K. Nishiyama;Y. Kuno;T. Yamazaki;H. Shirakawa
中科院分区：
文献类型：
--
作者：
K. Nagamine;K. Ishida;T. Matsuzaki;K. Nishiyama;Y. Kuno;T. Yamazaki;H. Shirakawa
正μ子被注入反式和顺式${（CH）}_{x}$以及${（CD）}_{x}$。一个显着的差异被发现在顺式和反式聚乙炔之间的μ子自旋弛豫函数的场依赖性。通过考虑由μ子产生的未成对电子得到了定量解释：它位于顺式聚乙炔中的附近碳上，形成自由基状态;另一方面，在反式聚乙炔中，它变得高度移动的，并采取一维孤子状运动，这清楚地表明了反根场依赖于弛豫速率。
Positive muons were injected into both trans- and cis-${(\mathrm{CH})}_{x}$ as well as ${(\mathrm{CD})}_{x}$. A marked difference was found in the field dependence of the muon spin-relaxation functions between cis- and trans-polyacetylene. A quantitative explanation was obtained by considering the unpaired electron produced by a muon: It is localized at the nearby carbons in cis-polyacetylene forming a radical state; on the other hand, in trans-polyacetylene, it becomes highly mobile and takes a one-dimensional solitonlike motion as clearly indicated by the inverse-root field dependence found for the relaxation rates.