Journal
JOURNAL OF MATERIALS SCIENCE
Volume 57, Issue 23, Pages 10677-10690Publisher
SPRINGER
DOI: 10.1007/s10853-022-07186-9
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Funding
- U.S. Department of Energy, Office of Science, Basic Energy Sciences, Materials Science and Engineering Division
- Deutsche Forschungsgemeinschaft [107745057]
- Office of Science of the U.S. Department of Energy [DE-AC05-00OR22725]
- NSF Office of Advanced Cyberinfrastructure
- Division of Materials Research within the NSF Directorate of Mathematical and Physical Sciences
- NSF [OAC-1931367, OAC-1931445, OAC-1931525]
- NAF [DMR-1822258]
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We compared different modeling approaches to study the electronic properties of the Hf0.05Nb0.05Ta0.8Ti0.05Zr0.05 high-entropy alloy. The special quasi-random structures modeling and the supercell method provided similar results for the ground state properties, and we found possible superconductivity in the alloy.
We present a comparative study of different modeling approaches to the electronic properties of the Hf0.05Nb0.05Ta0.8Ti0.05Zr0.05 high-entropy alloy. Common to our modeling is the methodology to compute the one-particle Green's function in the framework of density functional theory. We demonstrate that the special quasi-random structures modeling and the supercell, i.e., the locally self-consistent multiple-scattering methods, provide very similar results for the ground state properties such as the spectral function (density of states) and the equilibrium lattice parameter. To reconcile the multiple-scattering single-site coherent potential approximation with the real space supercell methods, we included the effect of screening of the net charges of the alloy components. Based on the analysis of the total energy and spectral functions computed within the density functional theory, we found no signature for the long-range or local magnetic moments formation in the Hf0.05Nb0.05Ta0.8Ti0.05Zr0.05 high-entropy alloy; instead, we find possible superconductivity below similar to 9K.
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