Metallic resistivity in crystalline ropes of single-wall carbon nanotubes
Metallic resistivity in crystalline ropes of single-wall carbon nanotubes
复制标题
DOI：
10.1103/physrevb.55.r4921
复制
发表时间：
1997-02-15
影响因子：
3.7
通讯作者：
Smalley, RE
中科院分区：
文献类型：
--
作者：
Fischer, JE;Dai, H;Smalley, RE
激光烧蚀（Co，Ni）掺杂的石墨产生类似于70%的单壁纳米管，主要是（10，10）扶手椅管，其自组织成直径> 100埃且>10 μ m长的结晶“绳”。我们发现在300 K时ρ（平行于）=0.03-0.10 m Ω cm，在T* = 35 K以上（以下）d ρ/dT为正（负）。未取向的整体样品表现出类似的行为，具有更高的（定向平均）结晶度和T*。高-T行为是一致的预测本征金属状态的这种结构。
Laser ablation of (Co,Ni)-doped graphite yields similar to 70% single-wall nanotubes, predominantly (10,10) armchair tubes which self-organize into crystalline ''ropes''>100 Angstrom in diameter and>10 mu m long. We find rho(parallel to)=0.03-0.10 m Omega cm at 300 K, with positive (negative) d rho/dT above (below) T* = 35 K. Unoriented bulk samples exhibit similar behavior, with higher (directionally averaged) resistivities and T*'s. The high-T behavior is consistent with the predicted intrinsic metallic state for this structure.