Microwave conductance spectra of single-walled carbon nanotube arrays
Microwave conductance spectra of single-walled carbon nanotube arrays
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DOI：
10.1063/1.3263708
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发表时间：
2009-11-16
影响因子：
4
通讯作者：
Vance, Andrew L.
中科院分区：
文献类型：
--
作者：
Highstrete, Clark;Lee, Mark;Vance, Andrew L.
在4 ~ 293 K温度范围内，测量了单壁碳纳米管（SWCNT）阵列在0.1 ~ 50 GHz频率范围内的复电导谱。使用纯电容性接触将接触效应与NT的响应分离，本征SWCNT阵列电导随频率增加，如f（s），指数s=0.67 +/-0.08，而与阵列尺寸和温度无关。光谱与许多强非均匀电子系统中发现的行为是一致的。这些阵列中的无序起源可能是拓扑的，而不是能量的。
Complex conductance spectra of single-walled carbon nanotube (SWCNT) arrays have been measured from 0.1 to 50 GHz at temperatures between 4 and 293 K. Using purely capacitive contacts to separate contact effects from the NTs' response, the intrinsic SWCNT array conductance increased with frequency as f(s) with exponent s=0.67 +/- 0.08 regardless of array size and temperature. The spectra are consistent with the behavior found in many strongly inhomogeneous electronic systems. The origin of disorder in these arrays is likely topological rather than energetic.