Heating Causes Nonlinear Microwave Absorption Anomaly in Single‐Walled Carbon Nanotubes

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Abstract
Microwave impedance measurements indicate a nonlinear absorption anomaly in single‐walled carbon nanotubes at low temperatures (below 20 K). We investigate the nature of the anomaly using a time resolved microwave impedance measurement technique. It proves that the anomaly has an extremely slow, a few hundred second long dynamics. This strongly suggests that the anomaly is not caused by an intrinsic electronic effect and that it is rather due to a slow heat exchange between the sample and the environment.
Funding Information
  • Hungarian National Research, Development and Innovation Office (NKFIH) (2017-1.2.1-NKP-2017-00001, K119442)

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