Descrição
Topological insulators are novel phases of matter characterized by the existence of gapless edge (2D) or surface (3D) states. Similarly, topological superconductors are predicted to host Majorana zero modes that could be used for topological quantum computing. (1) In this work, we consider a quantum anomalous Hall state (QAH) in proximity with an s-wave superconductor first studied by Qi, Hughes and Zhang. (2) By analyzing its bulk energy bands as a function of the model parameters, we construct the phase diagram of the system and show the existence of a topological superconducting phase that hosts chiral Majorana edge states via the bulk-edge correspondence. This is further corroborated by the numerical study of the system on a strip geometry.
Referências
1 QI, X.-L.; ZHANG, S.-C. Topological insulators and superconductors. Reviews of Modern Physics, v. 83, n. 4, p. 1057-1110, Oct. 2011. DOI: https://doi.org/10.1103/RevModPhys.83.1057.
2 QI, X.-L.; HUGHES, T. L.; ZHANG, S.-C. Chiral topological superconductor from the quantum Hall state. Physical Review B, v. 82, n. 18, p. 184516-1-184516-5, Nov. 2010. DOI: https://doi.org/10.1103/PhysRevB.82.184516.
| Certifico que os nomes citados como autor e coautor estão cientes de suas nomeações. | Sim |
|---|---|
| Palavras-chave | Majorana fermions. Topological superconductors. Chiral edge states. |
| Orientador e coorientador | José Carlos Egues de Menezes |
| Subárea 1 | Física da Matéria Condensada |
| Subárea 2 (opcional) | Informação e Computação Quântica |
| Agência de Fomento | CAPES |
| Número de Processo | PROEX 88887.705456/2022-00 |
| Modalidade | MESTRADO |
| Concessão de Direitos Autorais | Sim |
