Microwave photonic crystals as an experimental realization of a combined honeycomb-kagome lattice
| Autor: | Alexei Andreanov, Barbara Dietz, Wulayimu Maimaiti |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Superconductivity Quantum Physics Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Graphene FOS: Physical sciences 02 engineering and technology Reverse Monte Carlo Nonlinear Sciences - Chaotic Dynamics 021001 nanoscience & nanotechnology 01 natural sciences law.invention Crystal law Normal mode Lattice (order) Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Density of states Chaotic Dynamics (nlin.CD) Quantum Physics (quant-ph) 010306 general physics 0210 nano-technology Electronic band structure |
| Zdroj: | Physical Review B. 102 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.102.214301 |
| Popis: | In 2015 experiments were performed with superconducting microwave photonic crystals emulating artificial graphene B. Dietz, T. Klaus, M. Miski-Oglu, and A. Richter, Phys. Rev. B 91, 035411 (2015)]. The associated density of states comprises two Dirac points with adjacent bands including van Hove singularities, thus exhibiting the characteristic features originating from the extraordinary electronic band structure of graphene. They are separated by a narrow region of particularly high resonance density corresponding to a nearly flatband in the band structure, which is reminiscent of that of a honome lattice -- a combination of two sublattices: honeycomb and kagome. We demonstrate that, indeed, the density of states, and also the eigenmode properties and the fluctuations in the resonance-frequency spectra are well reproduced by a tight-binding model based on the honome lattice. A good description was achieved by means of the reverse Monte-Carlo approach, thereby confirming our intepretation of the microwave photonic crystal as an experimental realization of a honome lattice and providing an answer to longstanding problem, namely the understanding of the origin of the flatband bordered by two Dirac points, generally observed in microwave photonic crystals of different shapes. |
| Databáze: | OpenAIRE |
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