Polyaniline is a random-dimer model: A new transport mechanism for conducting polymers.
Polyaniline is a random-dimer model: A new transport mechanism for conducting polymers.
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DOI：
10.1103/physrevlett.66.1366
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发表时间：
1991-03
影响因子：
8.6
通讯作者：
H.-L. Wu;Philip Phillips
中科院分区：
文献类型：
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作者：
H.-L. Wu;Philip Phillips
在这里，我们考虑了导电聚合物聚苯胺的一条随机质子化的单链，并明确地表明，这个体系中固有的无序可以用邓拉普、吴和菲利普斯的随机二聚体模型来描述。莱特牧师。65，88(1990)]患有非对角线障碍。我们精确地证明了该模型的非散射态或导电态在能带中的位置与最近关于聚合物质子化形式的费米能级位置的计算一致。因此，我们认为随机二聚体模型能够解释聚苯胺的绝缘体-金属转变。
We consider here a single randomly protonated strand of the conducting polymer polyaniline and show explicitly that the disorder inherent in this system is described by the random-dimer model of Dunlap, Wu, and Phillips [Phys. Rev. Lett. 65, 88 (1990)] with off-diagonal disorder. We demonstrate exactly that the location in the energy band of the unscattered or conducting states of this model coincides with recent calculations of the location of the Fermi level in the protonated form of the polymer. We argue then that the random-dimer model is capable of explaining the insulator-metal transition in polyaniline.