Linear Response in Topological Materials

TL;DR

This paper reviews how topological materials exhibit enhanced linear electromagnetic responses due to their unique band structures and symmetries, highlighting their potential for advanced technological applications.

Contribution

It provides a comprehensive overview of the fundamental symmetry-based concepts of linear responses in topological materials and explores their potential applications.

Findings

Enhanced linear responses due to topological band structures

Symmetry plays a crucial role in designing materials with exotic responses

Potential for new technological applications in electronics and photonics

Abstract

The discovery of topological insulators and semimetals has opened up a new perspective to understand materials. Owing to the special band structure and enlarged Berry curvature, the linear responses are strongly enhanced in topological materials. The interplay of topological band structure and symmetries plays a crucial role for designing new materials with strong and exotic new electromagnetic responses and provides promising mechanisms and new materials for the next generation of technological applications. We review the fundamental concept of linear responses in topological materials from the symmetry point of view and discuss their potential applications.