- search hit 1 of 1
Topological states in two-dimensional Su-Schrieffer-Heeger models
Please always quote using this URN: urn:nbn:de:bvb:20-opus-267328
- We study the topological properties of the generalized two-dimensional (2D) Su-Schrieffer-Heeger (SSH) models. We show that a pair of Dirac points appear in the Brillouin zone (BZ), consisting a semimetallic phase. Interestingly, the locations of these Dirac points are not pinned to any high-symmetry points of the BZ but tunable by model parameters. Moreover, the merging of two Dirac points undergoes a novel topological phase transition, which leads to either a weak topological insulator or a nodal-line metallic phase. We demonstrate theseWe study the topological properties of the generalized two-dimensional (2D) Su-Schrieffer-Heeger (SSH) models. We show that a pair of Dirac points appear in the Brillouin zone (BZ), consisting a semimetallic phase. Interestingly, the locations of these Dirac points are not pinned to any high-symmetry points of the BZ but tunable by model parameters. Moreover, the merging of two Dirac points undergoes a novel topological phase transition, which leads to either a weak topological insulator or a nodal-line metallic phase. We demonstrate these properties by constructing two specific models, which we referred as type-I and type-II 2D SSH models. The feasible experimental platforms to realize our models are also discussed.…
Author: | Chang-An Li |
---|---|
URN: | urn:nbn:de:bvb:20-opus-267328 |
Document Type: | Journal article |
Faculties: | Fakultät für Physik und Astronomie / Institut für Theoretische Physik und Astrophysik |
Language: | English |
Parent Title (English): | Frontiers in Physics |
ISSN: | 2296-424X |
Year of Completion: | 2022 |
Volume: | 10 |
Article Number: | 861242 |
Source: | Frontiers in Physics 10:861242. doi: 10.3389/fphy.2022.861242 |
DOI: | https://doi.org/10.3389/fphy.2022.861242 |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Tag: | Dirac points; su-schrieffer-heeger (SSH) models; topological phase transitions; topological states; two-dimensions |
Release Date: | 2023/04/11 |
Date of first Publication: | 2022/03/16 |
Open-Access-Publikationsfonds / Förderzeitraum 2022 | |
Licence (German): | CC BY: Creative-Commons-Lizenz: Namensnennung 4.0 International |