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http://hdl.handle.net/1843/64160| Tipo: | Artigo de Periódico |
| Título: | Interplay between magnetic, metal/insulator and topological phases in Hg1−xMnxTe alloys: prediction of a ferromagnetic Weyl semimetal at x = 0.25 |
| Autor(es): | Orlando José Silveira Júnior Luiz Cláudio de Carvalho Horacio Wagner Leite Alves Helio Chacham |
| Resumo: | We report a theoretical investigation of magnetic, electronic, and topological properties of Hg1−xMnxTe alloys. We consider periodic structures with Mn concentrations as x = 0, 0.25, 0.5, 0.75, and 1. Our hybrid DFT/Hartree–Fock calculations for the bandgaps of antiferromagnetic (ground-state) phases are in good agreement with experiments. The calculations also show that the modification of the magnetic ordering from anti- to ferromagnetic leads to a significant bandgap reduction, resulting in a metal/insulator transition at higher Mn concentrations. We show that a ferromagnetic Weyl semimetal phase is achieved for x = 0.25, where a single pair of Weyl nodes mirrored by the point in the momentum space is observed. The non-trivial topological property of the ferromagnetic Hg0.75Mn0.25Te is confirmed by the calculation of the chirality of each Weyl node, which are connected by a surface Fermi arc of a semi infinite Hg0.75Mn0.25Te. |
| Assunto: | Magnetismo Ligas Teoria do funcional da densidade |
| Idioma: | eng |
| País: | Brasil |
| Editor: | Universidade Federal de Minas Gerais |
| Sigla da Instituição: | UFMG |
| Departamento: | ICX - DEPARTAMENTO DE FÍSICA |
| Tipo de Acesso: | Acesso Restrito |
| Identificador DOI: | https://doi.org/10.1088/1361-648X/ab3270 |
| URI: | http://hdl.handle.net/1843/64160 |
| Data do documento: | 2019 |
| metadata.dc.url.externa: | https://iopscience.iop.org/article/10.1088/1361-648X/ab3270 |
| metadata.dc.relation.ispartof: | Journal of Physics: Condensed Matter |
| Aparece nas coleções: | Artigo de Periódico |
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