Collective Excitations in 2D Materials

TL;DR

This review explores the unique collective excitations like plasmons, excitons, phonons, and magnons in 2D materials, highlighting their theoretical descriptions and potential technological applications in flexible electronics.

Contribution

It provides a comprehensive overview of the theoretical formalism and distinctive features of collective excitations in 2D materials, emphasizing their differences from 3D systems.

Findings

Distinct collective excitations in 2D vs 3D materials

Theoretical frameworks for plasmons, excitons, phonons, magnons

Implications for flexible electronic technologies

Abstract

Research on 2D materials has been one of the fastest-growing fields in condensed matter physics and materials science in the past 10 years. The low dimensionality and strong correlations of 2D systems give rise to electronic and structural properties, in the form of collective excitations, that do not have counterparts in ordinary 3D materials used in modern technology. These 2D materials present extraordinary opportunities for new technologies, such as in flexible electronics. In this Review, we focus on plasmons, excitons, phonons and magnons in 2D materials. We discuss the theoretical formalism of these collective excitations and elucidate how they differ from their 3D counterparts.