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http://hdl.handle.net/1843/64160
Type: | Artigo de Periódico |
Title: | Interplay between magnetic, metal/insulator and topological phases in Hg1−xMnxTe alloys: prediction of a ferromagnetic Weyl semimetal at x = 0.25 |
Authors: | Orlando José Silveira Júnior Luiz Cláudio de Carvalho Horacio Wagner Leite Alves Helio Chacham |
Abstract: | 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. |
Subject: | Magnetismo Ligas Teoria do funcional da densidade |
language: | eng |
metadata.dc.publisher.country: | Brasil |
Publisher: | Universidade Federal de Minas Gerais |
Publisher Initials: | UFMG |
metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA |
Rights: | Acesso Restrito |
metadata.dc.identifier.doi: | https://doi.org/10.1088/1361-648X/ab3270 |
URI: | http://hdl.handle.net/1843/64160 |
Issue Date: | 2019 |
metadata.dc.url.externa: | https://iopscience.iop.org/article/10.1088/1361-648X/ab3270 |
metadata.dc.relation.ispartof: | Journal of Physics: Condensed Matter |
Appears in Collections: | Artigo de Periódico |
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