Phonon transport in amorphous carbon using Green–Kubo modal analysis

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W. Lv and A. Henry, Phonon transport in amorphous carbon using GreenKubo modal analysis, Appl. Phys. Lett. 108, 181905 (2016).
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Abstract
Amorphous carbon (a-C) is an important material often used in microelectronics. Using a recently developed approach, termed Green–Kubo modal analysis, we were able to calculate the thermal conductivity of a-C, which yielded excellent agreement with experiments, by employing a simple correction to the specific heat. The results show that the heat capacity substantially limits the thermal conductivity of a-C at room temperature and it is dominated by contributions from diffusons between 10 and 40 THz. Furthermore, the phonon relaxation times in a-C do not vary significantly with increasing temperature, which is quite unusual by comparison with the behavior observed for other materials.
Phonon transport in amorphous carbon using Green–Kubo modal analysis