Dirac Point and Edge States in a Microwave Realization of Tight-Binding Graphene-like Structures - Condensed Matter > Mesoscale and Nanoscale PhysicsReport as inadecuate




Dirac Point and Edge States in a Microwave Realization of Tight-Binding Graphene-like Structures - Condensed Matter > Mesoscale and Nanoscale Physics - Download this document for free, or read online. Document in PDF available to download.

Abstract: We present a microwave realization of finite tight-binding graphene-likestructures. The structures are realized using discs with a high index ofrefraction. The discs are placed on a metallic surface while a second surfaceis adjusted atop the discs, such that the waves coupling the discs in the airare evanescent, leading to the tight-binding behavior. In reflectionmeasurements the Dirac point and a linear increase close to the Dirac point isobserved, if the measurement is performed inside the sample. Resonances due toedge states are found close to the Dirac point if the measurements areperformed at the zigzag-edge or at the corner in case of a broken benzene ring.



Author: U. Kuhl, S. Barkhofen, T. Tudorovskiy, H.-J. Stoeckmann, T. Hossain, L. de Forges de Parny, F. Mortessagne

Source: https://arxiv.org/







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