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Research on 1/f resistance fluctuation using carbon nano-tube

利用碳纳米管研究1/f电阻波动

基本信息

批准号：
16540336
负责人：
AKABANE Hideo
金额：
$ 1.02万
依托单位：
Ibaraki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

项目摘要

In the present study, 1/f resistance fluctuation of carbon nanotube was investigated experimentally, theoretically and also some simulations were performed. The carbon nanotubes were filled to glass capillar of 0.1mm diameter, this was used as a resistance, and the electric resistance fluctuation was measured. Here, three types of samples were prepared Single-wall simple cylinder type, multi-wall simple cylinder type and multi-wall cylinder type with a corn like cap. Temperature of the samples was changed between 300K to 100K. As the results, the resistance fluctuation of any types of carbon nano-tubes showed 1/f spectrum and their intensity decreased by the decreasing of the sample temperature, while the resistance value doubled. The decreasing of resistance fluctuations by the temperature change of the sample that adhered a cap was 1/4 and that open cylinder samples were about 1/100. A phonon mode interaction between axial mode and circumference mode happens frequently through the ca … More p structure in the sample that adhered a cap. It is thought that the existence of strong interaction is the reason why the intensity of 1/f resistance fluctuation did not decrease so much in the capped sample. Therefore, The generation of 1/f resistance fluctuation thought to be related to intermodal interaction of atomic vibration.In the simulation, fluctuation of the electron scattering probability in one-dimensional atomic chain having plural degree of freedom was investigated. Owing to the plural degree of freedom, though the non-linear term was not employed in the equation of motion, phonon mode interaction was generated and scattering probability showed 1/f spectra. These contents were reported to 18th international conference on noise and fluctuations, 2005, pp.795-798.In the theory, it was reported that the distribution function of phonon from nonequiriburium to equiriburium shows t^<1/2> type relaxation. t^<1/2> type relaxation causes 1/f fluctuation. This content was reported to Journal of the Physical Society of Japan, Vol.74 No. 10, 2005, pp.2708-2711. Less

本研究从实验、理论和模拟等方面研究了碳纳米管的1/f电阻波动。将碳纳米管填充到直径为0.1mm的玻璃毛细管中，将其用作电阻，并测量电阻波动。在此，制备了三种类型的样品：单壁简单圆筒型、多壁简单圆筒型和具有玉米状帽的多壁圆筒型。样品的温度在300 - 100 K之间变化。结果表明，任何类型的碳纳米管的电阻波动均呈现1/f谱，且随样品温度的降低，其强度减小，电阻值增加一倍。温度变化对电阻波动的影响，加盖试样为1/4，开筒试样约为1/100。在这种情况下，轴向模和周向模之间的声子模相互作用经常发生。 ...更多信息 p结构的样品中，粘附一个帽。我们认为强相互作用的存在是1/f电阻涨落强度在加盖样品中没有大幅度降低的原因。因此，1/f电阻涨落的产生被认为与原子振动的模间相互作用有关。在模拟中，研究了具有多个自由度的一维原子链中电子散射几率的涨落。由于多自由度的存在，尽管运动方程中没有引入非线性项，但仍产生了声子模相互作用，散射几率呈现1/f谱。这些内容已被报告给第18届国际噪声与涨落会议，2005，pp.795- 798。在理论上，报道了声子从非等离子体到等离子体的分布函数呈现t^<1/2>型弛豫。t^<1/2>型弛豫引起1/f涨落。这一内容被报道到Journal of the Physical Society of Japan，Vol.74 No.10，2005，pp.2708-2711。少