Superconducting versus semiconducting electronic ground state in chirality-specific double-wall carbon nanotubes
Superconducting versus semiconducting electronic ground state in chirality-specific double-wall carbon nanotubes
复制标题
手性特异性双壁碳纳米管中的超导与半导体电子基态
DOI：
10.1088/1367-2630/15/8/083021
复制
发表时间：
2013
影响因子：
3.3
通讯作者：
P. Sheng
中科院分区：
文献类型：
--
作者：
Ting Zhang;P. Sheng
利用双圈重正化群方法，研究了（3，3）@（8，8）和（5，0）@（15，0）两种双壁碳纳米管体系的电子-声子相互作用强度和库仑相互作用强度的相图.使用从头计算的两种类型的耦合强度的估计，这两个系统的规模超导固定点的温度降低到零。这与（3，3）和（5，0）单壁碳纳米管形成对比，其缩放到Peierls扭曲的半导体基态。在（3，3）@（8，8）系统中，超导转变温度可以很低，而在（5，0）@（15，0）系统中，超导行为是可以观察到的。我们的结果是支持最近的实验观察在DWCNTs的超导性。
By using two-loop renormalization group analysis, we explore the phase diagram with respect to the electron–phonon and Coulomb interaction strengths in the two (3,3)@(8,8) and (5,0)@(15,0) double-wall carbon nanotube systems (DWCNTs). Using estimation of the two types of coupling strengths from ab initio calculations, both systems are shown to scale to the superconducting fixed point as temperature decreases to zero. This is in contrast to the (3,3) and (5,0) single-wall carbon nanotubes, which scales to the Peierls-distorted semiconducting ground state. While the superconducting transition temperature can be quite low in the (3,3)@(8,8) system, the (5,0)@(15,0) promises observable superconducting behavior. Our result is in support of recent experimental observation of superconductivity in DWCNTs.
影响因子：
8.6
作者：
Takesue, I;Haruyama, J;Shinohara, H
通讯作者：
Shinohara, H