| Full text | |
| Author(s): |
Costa, Marcio
[1, 2, 3]
;
Schleder, Gabriel R.
[1, 3]
;
Mera Acosta, Carlos
[1]
;
Padilha, Antonio C. M.
[3]
;
Cerasoli, Frank
[4, 5]
;
Buongiorno Nardelli, Marco
[4, 5]
;
Fazzio, Adalberto
[1, 3]
Total Authors: 7
|
| Affiliation: | [1] Fed Univ ABC, Ctr Nat & Human Sci, Santo Andre, SP - Brazil
[2] Fluminense Fed Univ, Dept Phys, Niteroi, RJ - Brazil
[3] CNPEM, Brazilian Nanotechnol Natl Lab LNNano, Campinas - Brazil
[4] Univ North Texas, Dept Phys, Denton, TX 76203 - USA
[5] Univ North Texas, Dept Chem, Denton, TX 76203 - USA
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | NPJ COMPUTATIONAL MATERIALS; v. 7, n. 1 APR 12 2021. |
| Web of Science Citations: | 1 |
| Abstract | |
The discovery and realization of topological insulators, a phase of matter which hosts metallic boundary states when the d-dimension insulating bulk is confined to (d - 1)-dimensions, led to several potential applications. Recently, it was shown that protected topological states can manifest in (d - 2)-dimensions, such as hinge and corner states for three- and two-dimensional systems, respectively. These nontrivial materials are named higher-order topological insulators (HOTIs). Here we show a connection between spin Hall effect and HOTIs using a combination of ab initio calculations and tight-binding modeling. The model demonstrates how a non-zero bulk midgap spin Hall conductivity (SHC) emerges within the HOTI phase. Following this, we performed high-throughput density functional theory calculations to find unknown HOTIs, using the SHC as a criterion. We calculated the SHC of 693 insulators resulting in seven stable two-dimensional HOTIs. Our work guides novel experimental and theoretical advances towards higher-order topological insulator realization and applications. (AU) | |
| FAPESP's process: | 17/02317-2 - Interfaces in materials: electronic, magnetic, structural and transport properties |
| Grantee: | Adalberto Fazzio |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 16/14011-2 - Electronic properties: interfaces between topological insulators (TI-TI) |
| Grantee: | Marcio Jorge Teles da Costa |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 17/18139-6 - Machine learning for Materials Science: 2D materials discovery and design |
| Grantee: | Gabriel Ravanhani Schleder |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 18/11856-7 - Interface-induced effects in quantum materials |
| Grantee: | Carlos Augusto Mera Acosta |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 18/05565-0 - Weyl semi-metal surfaces |
| Grantee: | Antonio Cláudio Michejevs Padilha |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |