Topological properties of a bipartite lattice of domain wall states
| Autor: | Mario I. Molina, Fernanda Pinilla, José Mella, Francisco Muñoz |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
Multidisciplinary lcsh:R lcsh:Medicine 02 engineering and technology 021001 nanoscience & nanotechnology Topology 01 natural sciences Article Superposition principle Lattice (order) 0103 physical sciences Bipartite graph lcsh:Q Edge states 010306 general physics 0210 nano-technology lcsh:Science |
| Zdroj: | Scientific Reports Scientific Reports, Vol 8, Iss 1, Pp 1-9 (2018) |
| ISSN: | 2045-2322 |
| Popis: | We propose a generalization of the Su-Schrieffer-Heeger (SSH) model of the bipartite lattice, consisting of a periodic array of domain walls. The low-energy description is governed by the superposition of localized states at each domain wall, forming an effective mono-atomic chain at a larger scale. When the domain walls are dimerized, topologically protected edge states can appear, just like in the original SSH model. These new edge states are formed exclusively by soliton-like states and therefore, the new topological states are qualitatively different from the regular SSH edge states. They posses a much longer localization length and are more resistant to on-site disorder, in marked contrast to the standard SSH case. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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