First-Principles Prediction of New Electrides with Nontrivial Band Topology Based on One-Dimensional Building Blocks.
Phys Rev Lett
; 120(2): 026401, 2018 Jan 12.
Article
em En
| MEDLINE
| ID: mdl-29376709
ABSTRACT
We introduce a new class of electrides with nontrivial band topology by coupling materials database searches and first-principles-calculations-based analysis. Cs_{3}O and Ba_{3}N are for the first time identified as a new class of electrides, consisting of one-dimensional (1D) nanorod building blocks. Their crystal structures mimic ß-TiCl_{3} with the position of anions and cations exchanged. Unlike the weakly coupled nanorods of ß-TiCl_{3}, Cs_{3}O and Ba_{3}N retain 1D anionic electrons along the hollow interrod sites; additionally, a strong interrod interaction in C_{3}O and Ba_{3}N induces band inversion in a 2D superatomic triangular lattice, resulting in Dirac-node lines. The new class of electrides can serve as a prototype for new electrides with a large cavity space that can be utilized for various applications such as gas storage, ion transport, and metal intercalation.
Texto completo:
1
Base de dados:
MEDLINE
Tipo de estudo:
Prognostic_studies
/
Risk_factors_studies
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Estados Unidos