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http://hdl.handle.net/1843/64158| Type: | Artigo de Periódico |
| Title: | Activation of topological insulator phase in kagomé-type bilayers by interlayer coupling: the cases of Ni(CO)4 and Pd(CO)4 |
| Authors: | Orlando José Silveira Júnior Guilherme Almeida Silva Ribeiro Helio Chacham |
| Abstract: | We predict that a 2D kagomé-type topological insulator (TI) can be built as a bilayer of a single-layer material that is not a TI. We demonstrate this through first-principles calculations of a class of C6 O6 and C6ðNHÞ6 based 2D metal-organic frameworks. We find that minimum-energy bilayers of two compounds of this class, with stoichiometries NiðCOÞ4 and PdðCOÞ4 , are intrinsic topological insulators although their isolated single-layer components are trivial metals. The first-principles results for the single-layer and bilayer systems are reproduced by tight-binding models. The simplicity of the models suggests that other bilayer TI systems of this type should exist, not necessarily composed of metal-organic frameworks, as long as they are composed of kagomé-type systems in a AA stacking. |
| Subject: | Teoria do funcional da densidade Isoladores topológicos |
| 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/10.1063/1.5134834 |
| URI: | http://hdl.handle.net/1843/64158 |
| Issue Date: | 2020 |
| metadata.dc.url.externa: | https://pubs.aip.org/aip/apl/article/116/10/103103/38794/Activation-of-topological-insulator-phase-in |
| metadata.dc.relation.ispartof: | Applied Physics Letters |
| Appears in Collections: | Artigo de Periódico |
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