Thermal Conductivity Measurements in Atomically Thin Materials and Devices by T. Serkan Kasirga

Author:T. Serkan Kasirga
Language: eng
Format: epub
ISBN: 9789811553486
Publisher: Springer Singapore

2.4.5 3 Method

The method requires a narrow metal line to be placed on the material to be measured, typically prepared by lithography followed by metal evaporation. This metal line serves both as the heater and the thermometer for the measurements. An ac current at 2 is applied to the metal to cause Joule heating. This results in temperature oscillations of the metal line at frequency 2 and as a result the resistance change of the metal can be detected at the third harmonic 3. To my best knowledge, the method has not been applied to 2D materials due to the insensitivity of method to the in-plane and cross-plane thermal conductivity. However, I wanted to include it among the measurement techniques as it is potentially applicable to atomically thin isotropic materials.

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