# Surface Waves on the Interface Between Hyperbolic Material and Topological Insulator. 1

## TL;DR

This paper investigates the propagation of surface waves at the interface between a hyperbolic material and a topological insulator, deriving dispersion relations and conditions for their existence.

## Contribution

It provides a theoretical analysis of surface wave behavior at such interfaces, including dispersion relations and existence conditions for different anisotropy orientations.

## Key findings

- Surface waves exist under specific conditions derived in the study.
- Dispersion relations depend on anisotropy axis orientation.
- Conditions for surface wave existence are established.

## Abstract

Propagation of the surface waves on the interface between an uniaxial hyperbolic material and an isotopical topological insulator is studied. The cases of the anisotropy axes is normal to interface or one is coplanar to interface are discussed. The dispersion relations are derived and analyzed. The conditions of the existence of the surface waves are established.