Superconductivity in thin films of boron-doped carbon nanotubes
Superconductivity in thin films of boron-doped carbon nanotubes
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DOI：
10.1103/physrevlett.101.027002
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发表时间：
2008-07-11
影响因子：
8.6
通讯作者：
Yagi, Y.
中科院分区：
文献类型：
--
作者：
Murata, N.;Haruyama, J.;Yagi, Y.
碳纳米管的超导性引起了广泛的关注。然而，其与载流子掺杂的关系尚未见报道。我们报道了在组装硼(B)掺杂单壁碳纳米管（B- swnts）薄膜中发现的迈斯纳效应。我们发现，只有低硼浓度的B-SWNT膜才会导致明显的迈斯纳效应（T-c = 12 K），并且B-SWNT的高度均匀系综至关重要。B-SWNTs的第一性原理电子结构研究有力地支持了这些结果。
Superconductivity in carbon nanotubes (CNTs) is attracting considerable attention. However, its correlation with carrier doping has not been reported. We report on the Meissner effect found in thin films consisting of assembled boron (B)-doped single-walled CNTs (B-SWNTs). We find that only B-SWNT films consisting of low boron concentration leads to evident Meissner effect with T-c = 12 K and also that a highly homogeneous ensemble of the B-SWNTs is crucial. The first-principles electronic-structure study of the B-SWNTs strongly supports these results.