The 1/f noise in multiwalled carbon nanotubes

• 来源期刊: 中国物理（英文版）
• 关键词: carbon nanotubes 1/f noise environmental quantum fluctuation
• 年，卷（期）: 2005,（10）
• 页码范围: 2090-2092
• 页数: 3页
• 语种: 英文

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.