单壁碳纳米管的超导电性

Superconductivity of Single-Walled Carbon Nanotubes

阐述了电弧法制备单壁碳纳米管以及在单壁碳纳米管内实现超导态的实验方法。对用电弧法制备碳纳米管的实验条件、实验过程和实验产物进行了讨论。此外 ,分析了用“接近诱导法”实现碳纳米管的超导电态的具体条件 ,即将单壁碳纳米管束或单个碳纳米管嵌放在两个超导电极之间 ,在一定的条件下 ,有可能在碳纳米管内诱导出超导电流。已有的实验显示碳纳米管内的超导电流的临界值较大 ,并表现出特殊的对温度和磁场的依赖性。“接近诱导法”

The electric-arc technique used to generate single-walled carbon nanotubes (SWCNTs) is introduced. Especially, the superconductivity of SWCNTS is concerned. The samples of single-walled carbon nanotubes are suspended between two superconducting electrodes and their super-currents may be observed under special conditions. It is called 'proximity-induced method'. With the method, some experiments show that SWCNTs have higher critic super-currents, and the temperature and magnetic field dependence of the critic currents exhibits unusual features.