Theory of superconductivity in multiwalled carbon nanotubes
Theory of superconductivity in multiwalled carbon nanotubes
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多壁碳纳米管超导理论
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
J. González
中科院分区：
文献类型：
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作者：
E. Perfetto;J. González
我们设计了一种方法来描述掺杂多壁纳米管的电子不稳定性，其中每个壳通常具有多个费米点。我们的分析依赖于不同散射过程的尺度依赖性，表明由于其特定的几何排列，足够多的费米点会出现配对不稳定。最近壳层之间库珀对的隧道效应增强了不稳定性，从而在相图的较宽区域内引起从卢廷格液体到超导状态的转变。
We devise an approach to describe the electronic instabilities of doped multi-walled nanotubes, where each shell has in general a manifold of Fermi points. Our analysis relies on the scale dependence of the different scattering processes, showing that a pairing instability arises for a large enough number of Fermi points as a consequence of their particular geometric arrangement. The instability is enhanced by the tunneling of Cooper pairs between nearest shells, giving rise to a transition from the Luttinger liquid to a superconducting state in a wide region of the phase diagram.