Ferromagnetism in layered metallic Fe1/4TaS2 in the presence of conventional and Dirac carriers
| Autor: | Wang, Jin-Hua, Quan, Ya-Min, Liu, Da-Yong, Zou, Liang-Jian |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Chinese Physics Letters 37, 017101 (2020) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/0256-307X/37/1/017101 |
| Popis: | In this paper we present the microscopic origin of the ferromagnetism of Fe0.25TaS2 and its finite-temperature magnetic properties. We first obtain the band structures of Fe0.25TaS2 by the first-principles calculations and find that both conventional and Dirac carriers coexist in metallic Fe0.25TaS2. Accordingly, considering the spin-orbit coupling of Fe 3d ion, we derive an effective RKKY-type Hamiltonian between Fe spins in the presence of both the conventional parabolic-dispersion and the Dirac linear-dispersion carriers, which contains a Heisenberg-like, an Ising-like and an XY-like term. In addition, we obtain the ferromagnetic Curie temperature Tc by using the cluster self-consistent field method. Our results could address not only the high ferromagnetic Curie temperature, but also the large magnetic anisotropy in FexTaS2. Comment: 13 pages, 4 figures |
| Databáze: | arXiv |
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