Resonance quantum transport in doped conducting polymers: The improbable becomes possible

被引：10
|
作者：
Prigodin, VN
Epstein, AJ
机构：
[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA
[2] Ohio State Univ, Dept Chem, Columbus, OH 43210 USA
来源：
EUROPHYSICS LETTERS | 2002年 / 60卷 / 05期
关键词：
D O I：
10.1209/epl/i2002-00372-y
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Metallic doped polymers ( polyaniline and polypyrrole) have an electromagnetic response that, when analyzed within the standard theory of metals, is provided by an extremely small fraction of the total number of available electrons similar to0.1% ( in contrast to similar to100% for common metals) but with anomalous long scattering time greater than or similar to10(-13) s(similar to100 times longer than for common metals). We show that a network of metallic grains (polymer s crystalline domains) connected by resonance quantum tunneling through localized states in surrounding disordered medium produces this behavior. The small fraction of electrons is assigned to the low density of resonance states and the long scattering time is related to the narrow width of energy levels in resonance.
引用
收藏
页码：750 / 756
页数：7
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