Rényi entropies and topological quantum numbers in 2D gapped Dirac materials
| Autor: | Elvira Romera, Juan Carlos Bolívar |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
Condensed matter physics Topological degeneracy Silicene General Physics and Astronomy Insulator (electricity) 02 engineering and technology 021001 nanoscience & nanotechnology Quantum number Topology 01 natural sciences Magnetic field Honeycomb structure Topological insulator Quantum mechanics 0103 physical sciences 010306 general physics 0210 nano-technology Topological quantum number |
| Zdroj: | Physics Letters A. 381:1753-1756 |
| ISSN: | 0375-9601 |
| DOI: | 10.1016/j.physleta.2017.03.037 |
| Popis: | New topological quantum numbers are introduced by analyzing complexity measures and relative Renyi entropies in silicene in the presence of perpendicular electric and magnetic fields. These topological quantum numbers characterize the topological insulator and band insulator phases in silicene. In addition, we have found that, these information measures reach extremum values at the charge neutrality points. These results are valid for other 2D gapped Dirac materials analogous to silicene with a buckled honeycomb structure and a significant spin-orbit coupling. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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