Electronic, Mechanical and Elastic Anisotropy Properties of X-Diamondyne (X = Si, Ge)
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2019-10-31 |
| Journal | Materials |
| Authors | Qingyang Fan, Zhongxing Duan, Yanxing Song, Wei Zhang, Qidong Zhang |
| Institutions | Xiāan University of Architecture and Technology, Xidian University |
| Citations | 10 |
Abstract
Section titled āAbstractāThe three-dimensional (3D) diamond-like semiconductor materials Si-diamondyne and Ge-diamondyne (also called SiC4 and GeC4) are studied utilizing density functional theory in this work, where the structural, elastic, electronic and mechanical anisotropy properties along with the minimum thermal conductivity are considered. SiC4 and GeC4 are semiconductor materials with direct band gaps and wide band gaps of 5.02 and 5.60 eV, respectively. The Debye temperatures of diamondyne, Si- and Ge-diamondyne are 422, 385 and 242 K, respectively, utilizing the empirical formula of the elastic modulus. Among these, Si-diamondyne has the largest mechanical anisotropy in the shear modulus and Youngās modulus, and Diamond has the smallest mechanical anisotropy in the Youngās modulus and shear modulus. The mechanical anisotropy in the Youngās modulus and shear modulus of Si-diamondyne is more than three times that of diamond as determined by the characterization of the ratio of the maximum value to the minimum value. The minimum thermal conductivity values of Si- and Ge-diamondyne are 0.727 and 0.524 W cmā1 Kā1, respectively, and thus, Si- and Ge-diamondyne may be used in the thermoelectric industry.
Tech Support
Section titled āTech SupportāOriginal Source
Section titled āOriginal SourceāReferences
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