Abstract
The requirement of the continuous reduction of the device size prompts the development of the low-dimensional materials. The structural, electronic, and magnetic properties of CoS2-FeS2 interface thin films are studied by first principles calculations considering spin polarization. The low-dimensional SS-Fe-terminated and SS-SS-terminated CoS2-FeS2 interfacial thin films are half-metallic and therefore are potential materials to be applied in spintronics. Both the partial density of states and Bader charge states of atoms are more affected by the surface effect than by the interface effect for all the interfacial thin films. The magnetic moment of the CoS2-FeS2 interface thin films is mainly distributed on Co atoms on the CoS2 side, and the changes of magnetic moment of the atoms near the surface are more obvious than those near the interface. The magnetic charge density of Fe atoms in the metallic interfacial thin films is more obvious than that in the half-metallic interface films. The individual CoS2 (FeS2) film and the SiO2 substrate affect the property of the corresponding CoS2-FeS2 interfacial thin film.
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Acknowledgements
The work was carried out at Shanxi Supercomputing Center of China, and the calculations were performed on TianHe-2.
Funding
Supported by Scientific and Technologial Innovation Programs of Higher Education Institutions in Shanxi (Grant No. 2020L0628), Program for the (Reserved) Discipline Leaders of Taiyuan Institute of Technology, and the Fundamental Research Funds for the Central Universities (Grant No. 2017TS004, 2017TS006, and GK201704005).
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Feng, ZY., Wei, X., Zhao, JY. et al. The Surface and Interface Effects on the CoS2-FeS2 Interfacial Films. J Supercond Nov Magn 34, 2983–2998 (2021). https://doi.org/10.1007/s10948-021-06034-2
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DOI: https://doi.org/10.1007/s10948-021-06034-2