中国物理B ›› 2005, Vol. 14 ›› Issue (10): 2090-2092.doi: 10.1088/1009-1963/14/10/027

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The 1/f noise in multiwalled carbon nanotubes

孔文婕, 吕力, 张殿琳, 潘正伟   

  1. Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2005-06-13 修回日期:2005-06-15 出版日期:2005-10-20 发布日期:2005-10-20

The 1/f noise in multiwalled carbon nanotubes

Kong Wen-Jie (孔文婕), Lü Li (吕力), Zhang Dian-Lin (张殿琳), Pan Zheng-Wei (潘正伟)   

  1. Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China
  • Received:2005-06-13 Revised:2005-06-15 Online:2005-10-20 Published:2005-10-20

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摘要： The $1/f$ noise in multiwalled carbon nanotubes bundles has been investigated between the frequency range of 0.1 to 30 Hz. At room temperature the noise spectrum is standard 1/f, and its level is proportional to the square of the bias voltage. With decreasing temperature the noise level also decreases. At 4.2 K the noise level follows a non-monotonic dependence against the bias voltage, showing a peak at a certain bias voltage, meanwhile its frequency dependence also deviates from the 1/f trend. This anomalous behaviour is discussed within the picture of environmental quantum fluctuation of charge transport in the samples.

关键词: carbon nanotubes, 1/f noise, environmental quantum fluctuation

Abstract: The $1/f$ noise in multiwalled carbon nanotubes bundles has been investigated between the frequency range of 0.1 to 30 Hz. At room temperature the noise spectrum is standard 1/f, and its level is proportional to the square of the bias voltage. With decreasing temperature the noise level also decreases. At 4.2 K the noise level follows a non-monotonic dependence against the bias voltage, showing a peak at a certain bias voltage, meanwhile its frequency dependence also deviates from the 1/f trend. This anomalous behaviour is discussed within the picture of environmental quantum fluctuation of charge transport in the samples.

Key words: carbon nanotubes, 1/f noise, environmental quantum fluctuation

中图分类号:  (Nanotubes)

  • 73.63.Fg
72.70.+m (Noise processes and phenomena) 05.40.Ca (Noise)