Magnetism in Rb$_{x}$Sr$_{1-x}$C novel alloy
| Autor: | Berrezzoug, D. B., Lakdja, A. |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Condens. Matter Phys., 2020, vol. 23, No. 1, 13602 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.5488/CMP.23.13602 |
| Popis: | We report a study on the electronic and magnetic properties of a novel Rb$_{x}$Sr$_{1-x}$C alloy. We find that the variation of the lattice parameter as function of Rb composition exhibits a deviation from the Vegard's law of about 0.4 {\AA}. The total energy results predict a ferromagnetic ordering for Sr-rich alloy, and antiferromagnetic ordering for RbC-rich alloy with a total magnetic moment ranging from 2 to 3$\mu_\text{B}$ per cation. As for the parent compounds, RbC and SrC, the origin of magnetism arises from the polarization of the carbon $p$-orbitals. From the spin-polarized calculations, we note that the half-metallicity in the Rb$_{x}$Sr$_{1-x}$C alloy is confirmed for $x<0.875$. On the other hand, a direct band gap is observed in the semiconducting spin part, in contrast to the pure parent compounds. Comment: 8 pages, 6 figures |
| Databáze: | arXiv |
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