Abstract
The non-Hermitian topological properties of electromagnetic media have attracted much attention. In the present work, we reveal the properties of the topology of non-Hermitian electromagnetic media with a magneto-electric effect. By renormalizing the permittivity, we acquire the electromagnetic media topological phase diagram under the influence of magneto-electric effects. We find that the topological phase transition in the system is driven by the renormalization of the permittivity and permeability. This work provides an alternative way to explore the various topological phases of the electromagnetic media.
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