Realization of a one-dimensional topological insulator in ultrathin germanene nanoribbons
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2024
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866912427143069696 |
|---|---|
| author | Klaassen, Dennis J. Eek, Lumen A. G. Rudenko, Alexander N. Westende, Esra D. van`t Castenmiller, Carolien Zhang, Zhiguo de Boeij, Paul van Houselt, Arie Ezawa, Motohiko Zandvliet, Harold J. W. Smith, Cristiane Morais Bampoulis, Pantelis |
| author_facet | Klaassen, Dennis J. Eek, Lumen A. G. Rudenko, Alexander N. Westende, Esra D. van`t Castenmiller, Carolien Zhang, Zhiguo de Boeij, Paul van Houselt, Arie Ezawa, Motohiko Zandvliet, Harold J. W. Smith, Cristiane Morais Bampoulis, Pantelis |
| contents | Realizing a one-dimensional (1D) topological insulator and identifying the lower dimensional limit of two-dimensional (2D) behavior are crucial steps toward developing high-density quantum state networks, advancing topological quantum computing, and exploring dimensionality effects in topological materials. Although 2D topological insulators have been experimentally realized, their lower dimensional limit and 1D counterparts remain elusive. Here, we fabricated and characterized arrays of zigzag-terminated germanene nanoribbons, a 2D topological insulator with a large topological bulk gap. The electronic properties of these nanoribbons strongly depend on their width, with topological edge states persisting down to a critical width (approx. 2 nm), defining the limit of 2D topology. Below this threshold, contrary to the tenfold way classification, we observe zero-dimensional (0D) states localized at the ends of the ultrathin nanoribbons. These end states, topologically protected by time-reversal and mirror symmetries, mark the first realization of a 1D topological insulator with strong spin-orbit coupling. Our findings establish germanene nanoribbons as a platform for investigating 1D topology and dimensionality effects in topological materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_18156 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Realization of a one-dimensional topological insulator in ultrathin germanene nanoribbons Klaassen, Dennis J. Eek, Lumen A. G. Rudenko, Alexander N. Westende, Esra D. van`t Castenmiller, Carolien Zhang, Zhiguo de Boeij, Paul van Houselt, Arie Ezawa, Motohiko Zandvliet, Harold J. W. Smith, Cristiane Morais Bampoulis, Pantelis Mesoscale and Nanoscale Physics Materials Science Realizing a one-dimensional (1D) topological insulator and identifying the lower dimensional limit of two-dimensional (2D) behavior are crucial steps toward developing high-density quantum state networks, advancing topological quantum computing, and exploring dimensionality effects in topological materials. Although 2D topological insulators have been experimentally realized, their lower dimensional limit and 1D counterparts remain elusive. Here, we fabricated and characterized arrays of zigzag-terminated germanene nanoribbons, a 2D topological insulator with a large topological bulk gap. The electronic properties of these nanoribbons strongly depend on their width, with topological edge states persisting down to a critical width (approx. 2 nm), defining the limit of 2D topology. Below this threshold, contrary to the tenfold way classification, we observe zero-dimensional (0D) states localized at the ends of the ultrathin nanoribbons. These end states, topologically protected by time-reversal and mirror symmetries, mark the first realization of a 1D topological insulator with strong spin-orbit coupling. Our findings establish germanene nanoribbons as a platform for investigating 1D topology and dimensionality effects in topological materials. |
| title | Realization of a one-dimensional topological insulator in ultrathin germanene nanoribbons |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2411.18156 |