期刊
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
卷 258, 期 10, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.202100181
关键词
density functional theory (DFT) calculations; elastic properties; rare-earth oxyorthosilicates; thermal conductivity
资金
- Ministry of Science and Higher Education of the Russian Federation [FEUZ-2020-0054]
First-principles calculations using hybrid functionals within the framework of density functional theory were conducted on a range of oxyorthosilicates R2SiO5 (with R representing rare-earth ions) to determine their crystal structure and elastic properties. The results showed that La2SiO5 and Pr2SiO5 have the minimum thermal conductivity among the oxyorthosilicates studied.
First-principles calculations of the crystal structure and elastic properties of a range of oxyorthosilicates R2SiO5 (R denotes rare-earth ion) are performed in the framework of density functional theory (DFT) with hybrid functionals. The elastic moduli, sound velocities, Debye temperature, and minimum thermal conductivity coefficient are calculated for Lu2SiO5 in good agreement with the experiment, and a prediction of these parameters for a range of R2SiO5 is made. It is shown that La2SiO5 and Pr2SiO5 have the minimum thermal conductivity from a range of oxyorthosilicates.
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