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Probing emergent axion electrodynamics with waveguide apparatus

André H. Gomes, Winder A. Moura-Melo

Abstract

We demonstrate that a conventional hollow conductor waveguide filled with a material exhibiting the coexistence of chiral magnetic and anomalous quantum Hall effects supports the propagation of transverse electromagnetic modes. This simple setup provides a direct and optically feasible method to probe the simultaneous presence of these phenomena, potentially enabling the detection of an emergent axion-like field within condensed matter systems.

Probing emergent axion electrodynamics with waveguide apparatus

Abstract

We demonstrate that a conventional hollow conductor waveguide filled with a material exhibiting the coexistence of chiral magnetic and anomalous quantum Hall effects supports the propagation of transverse electromagnetic modes. This simple setup provides a direct and optically feasible method to probe the simultaneous presence of these phenomena, potentially enabling the detection of an emergent axion-like field within condensed matter systems.

Paper Structure

This paper contains 21 equations, 2 figures.

Figures (2)

  • Figure 1: Schematics of a cylindrical waveguide consisting of a hollow metallic wall (gray cladd) filled with a compound supporting the coexistence of CME and AQHE (the core depicted in light green color). A light beam is imparted to the compound and TEM modes propagate through it when an external magnetic field $\mathbf{B}_\text{ext}=B_0 \hat{\mathbf{z}}$ is turned on.
  • Figure 2: Cross-sectional profiles of the electric (top) and magnetic (bottom) fields of a propagating TEM wave inside a rectangular waveguide with a width-to-height ratio of 3:1.