Thermal conductivity of pink CVD diamond - Influence of nitrogen-related centers
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2023-01-10 |
| Journal | Journal of Applied Physics |
| Authors | A. V. Inyushkin, Š. Š. Š¢Š°Š»Š“ŠµŠ½ŠŗŠ¾Š², Victor Ralchenko, Guoyang Shu, Bing Dai |
| Institutions | Institute of Spectroscopy, Prokhorov General Physics Institute |
| Citations | 6 |
Abstract
Section titled āAbstractāThermal conductivity Īŗ(T) of single-crystal CVD diamond lightly doped (about 3 ppm) with nitrogen has been measured at temperatures from 5.7 to 410 K. The sample was carefully characterized by optical absorption and photoluminescence spectroscopy for the presence of impurities. Nine different optically active defects related with nitrogen, hydrogen, and silicon impurities have been identified and quantified. This pink-tint crystal showed a high thermal conductivity of 24.0Ā±0.5 W cmā1 Kā1 at room temperature, which is very close to the highest value ever measured at about 25 W cmā1 Kā1 for diamonds of natural isotopic composition. At the same time, the Īŗ(T) of the crystal showed strong suppression >10% at temperatures 6<T<120 K with a maximum decrease of 2.7 times at ā40 K compared to high purity diamonds. This behavior of the conductivity is attributed to a phonon scattering by charge carriers bound to nitrogen-related impurity centers, which is ineffective, however, at room and higher temperatures. The Īŗ(T) has been calculated within the model based on the Callaway theory taking into account the elastic phonon scattering off charge carriers (holes and electrons) in the ground states of doping centers, and a very good agreement between the measured and theoretical data has been achieved. The model also gives a good approximation to the experimental data for Īŗ(T) given in the literature for synthetic and natural single-crystal diamonds.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
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