Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/66033
Título: | Magneto-optical Kerr effect in spin split two-dimensional massive Dirac materials |
Autor(es): | Catarina, G. Peres, N. M. R. Fernández-Rossier, J. |
Palavras-chave: | magneto-optical Kerr effect two-dimensional massive Dirac model exchange spin splitting spin-orbit interactions diluted magnetic impurities |
Data: | 2020 |
Editora: | IOP Publishing Ltd |
Revista: | 2D Materials |
Resumo(s): | Two-dimensional (2D) massive Dirac electrons possess a finite Berry curvature, with Chern number 1/2, that entails both a quantized dc Hall response and a subgap full-quarter Kerr rotation. The observation of these effects in 2D massive Dirac materials such as gapped graphene, hexagonal boron nitride or transition metal dichalcogenides (TMDs) is obscured by the fact that Dirac cones come in pairs with opposite sign Berry curvatures, leading to a vanishing Chern number. Here, we show that the presence of spin-orbit interactions, combined with an exchange spin splitting induced either by diluted magnetic impurities or by proximity to a ferromagnetic insulator, gives origin to a net magneto-optical Kerr effect in such systems. We focus on the case of TMD monolayers and study the dependence of Kerr rotation on frequency and exchange spin splitting. The role of the substrate is included in the theory and found to critically affect the results. Our calculations indicate that state-of-the-art magneto-optical Kerr spectroscopy can detect a single magnetic impurity in diluted magnetic TMDs. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/66033 |
DOI: | 10.1088/2053-1583/ab6781 |
ISSN: | 2053-1583 |
e-ISSN: | 2053-1583 |
Versão da editora: | https://iopscience.iop.org/article/10.1088/2053-1583/ab6781 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | PHYSICS OF QUANTUM MATERIALS AND BIONANOSTRUCTURES (2018 - ...) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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1910.13371.pdf | 973,99 kB | Adobe PDF | Ver/Abrir |
Este trabalho está licenciado sob uma Licença Creative Commons