Electronic and structural properties of crystalline and amorphous (TaNbHfTiZr)C from first principles
| Autor: | Bram van der Linden, Tadeus Hogenelst, Roland Bliem, Kateřina Dohnalová, Corentin Morice |
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| Přispěvatelé: | IoP (FNWI), ARCNL (WZI, IoP, FNWI), ITFA (IoP, FNWI), Hard Condensed Matter (WZI, IoP, FNWI), String Theory (ITFA, IoP, FNWI) |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Journal of Physics Condensed Matter, 34(42):425403. IOP Publishing Ltd. |
| ISSN: | 0953-8984 |
| Popis: | High entropy materials (HEMs) are of great interest for their mechanical, chemical and electronic properties. In this paper we analyse (TaNbHfTiZr)C, a carbide type of HEM, both in crystalline and amorphous phases, using density functional theory (DFT). We find that the relaxed lattice volume of the amorphous phase is larger, while its bulk modulus is lower, than that of its crystalline counterpart. Both phases are metallic with all the transition metals contributing similarly to the density of states (DOS) close to the Fermi level, with Ti and Nb giving the proportionally largest contribution of states. We confirm that despite its great structural complexity, 2x2x2 supercells are large enough for reliable simulation of the presented mechanical and electronic properties by DFT. Comment: 10 pages, 6 figures |
| Databáze: | OpenAIRE |
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