Bloch classification surface for three-band systems
| Autor: | Abramovici, Gilles |
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| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | 2024 Phys. Scr |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/1402-4896/ad8b82 |
| Popis: | Topologically protected states can be found in physical systems, that show singularities in some energy contour diagram. These singularities can be characterized by winding numbers, defined on a classification surface, which maps physical state parameters. We have found a classification surface, which applies for three-band hamiltonian systems in the same way than standard Bloch surface does for two-band ones. This generalized Bloch surface is universal in the sense that it classifies a very large class of three-band systems, which we have exhaustively studied, finding specific classification surfaces, applying for each one. Comment: 20 pages, 19 figures |
| Databáze: | arXiv |
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