| Full text | |
| Author(s): |
Focassio, Bruno
[1, 2]
;
Schleder, Gabriel R.
[1, 2]
;
Costa, Marcio
[1, 3]
;
Fazzio, Adalberto
[1, 2]
;
Lewenkopf, Caio
[3]
Total Authors: 5
|
| Affiliation: | [1] CNPEM, Brazilian Nanotechnol Natl Lab LNNano, BR-13083970 Campinas, SP - Brazil
[2] Fed Univ ABC UFABC, BR-09210580 Santo Andre, SP - Brazil
[3] Univ Fed Fluminense, Inst Fis, BR-24210346 Niteroi, RJ - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | 2D MATERIALS; v. 8, n. 2 APR 2021. |
| Web of Science Citations: | 1 |
| Abstract | |
We investigate the structure and electronic spectra properties of two-dimensional amorphous bismuthene structures and show that these systems are topological insulators. We employ a realistic modeling of amorphous geometries together with density functional theory for electronic structure calculations. We investigate the system topological properties throughout the amorphization process and find that the robustness of the topological phase is associated with the spin-orbit coupling strength and size of the pristine topological gap. Using recursive non-equilibrium Green's function, we study the electronic transport properties of nanoribbons devices with lengths comparable to experimentally synthesized materials. We find a 2e(2)/h conductance plateau within the topological gap and an onset of Anderson localization at the trivial insulator phase. (AU) | |
| 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: | 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: | 17/02317-2 - Interfaces in materials: electronic, magnetic, structural and transport properties |
| Grantee: | Adalberto Fazzio |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 19/04527-0 - Interface between crystalline topological insulators and 2D-trivial materials: defect proximity study |
| Grantee: | Bruno Focassio |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |