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Caustics due to a negative refractive index in circular graphene p-n junctions |
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| Authors: | Cserti József Pályi András Péterfalvi Csaba |
| Affiliation: | Department of Physics of Complex Systems, E?tv?s University, H-1117 Budapest, Pázmány Péter sétány 1/A, Hungary. |
| Abstract: | We show that the wave functions form caustics in circular graphene p-n junctions which in the framework of geometrical optics can be interpreted with a negative refractive index. |
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