Possible organic superconductor
Possible organic superconductor
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可能的有机超导体
DOI：
10.1080/00268976600101301
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发表时间：
1966
影响因子：
1.7
通讯作者：
L. Salem
中科院分区：
文献类型：
--
作者：
L. Salem
很少有人提出[1]，由共轭多烯主链和一系列规则间隔的侧链组成的某些有机分子可能是超导的。如果侧链是容易极化的，则多烯电子将通过侧链中电子分布的瞬时极化而强烈耦合，可能导致整体吸引相互作用和沿着脊柱形成电子对。最近，保卢斯表明，在脊柱中的电子之间的库仑排斥不会被屏蔽。他还指出[2]，利特尔在每个侧链的末端使用两个相反的点电荷来表示其极化分布，在很大程度上高估了有效极化和多烯电子之间的耦合。在侧链中诱导的跃迁密度实际上会在其整个长度上扩散，它引起的耦合太小，不可能导致超导性。保卢斯的结论是，不太可能找到任何取代基来提供多烯电子之间的足够耦合，使整个相互作用具有吸引力。
Little has proposed [1] that certain organic molecules, built out of a conjugated polyenic spine together with a series of regularly spaced side-chains, may possibly be superconducting. If the side-chains are easily polarizable the polyene electrons will be strongly coupled via the instantaneous polarization of the electron distribution in the side-chains, leading possibly to an overall attractive interaction and the formation of electron pairs along the spine. Recently, Paulus showed that the Coulomb repulsion between electrons in the spine would not be screened. He also pointed out [2] that Little, by using two opposite point charges at the ends of each side-chain to represent its polarized distribution, had largely overestimated the effective polarization and the consequent coupling between polyene electrons. The transition density induced in the side-chain will actually spread out over its entire length, and the coupling which it provokes is far too small to lead to superconductivity. Paulus concluded that it is unlikely that any substituent can be found which would provide sufficient coupling between polyene electrons to make the overall interaction attractive.