Strong superconductivity with local Jahn-Teller phonons in C60 solids -: art. no. 167006
Strong superconductivity with local Jahn-Teller phonons in C60 solids -: art. no. 167006
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DOI：
10.1103/physrevlett.90.167006
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发表时间：
2003-04-25
影响因子：
8.6
通讯作者：
Crespi, VH
中科院分区：
文献类型：
--
作者：
Han, JE;Gunnarsson, O;Crespi, VH
我们分析了富勒烯超导电性在实验掺杂水平，处理电子-电子和电子-声子相互作用的平等地位，并证明了Jahn-Teller声子创建一个本地（分子内）配对，这是令人惊讶的抵抗库仑排斥，尽管在这些低带宽系统的延迟的弱点。对整个固体的相干性的要求则产生对T-c的非常强的掺杂依赖性，这与实验一致，并且比标准Eliashberg理论的预期强得多。
We analyze fulleride superconductivity at experimental doping levels, treating the electron-electron and electron-phonon interactions on an equal footing, and demonstrate that the Jahn-Teller phonons create a local (intramolecular) pairing which is surprisingly resistant to the Coulomb repulsion, despite the weakness of retardation in these low-bandwidth systems. The requirement for coherence throughout the solid then yields a very strong doping dependence to T-c, one consistent with experiment and much stronger than expected from standard Eliashberg theory.