Electronic Transport in Two-Dimensional Materials

TL;DR

This review discusses charge transport mechanisms in post-graphene 2D materials like transition metal dichalcogenides and black phosphorus, highlighting recent advances and future research directions in electronic properties and device applications.

Contribution

It provides a focused overview of electronic transport in non-graphene 2D materials, emphasizing mechanisms, control methods, and heterostructure interactions, filling a gap left by previous general reviews.

Findings

Analysis of bandstructure control via thickness and external fields

Discussion of valley polarization and scattering mechanisms

Insights into heterojunctions and composite films

Abstract

Two-dimensional (2D) materials have captured the attention of the scientific community due to the wide range of unique properties at nanometer-scale thicknesses. While significant exploratory research in 2D materials has been achieved, the understanding of 2D electronic transport and carrier dynamics remains in a nascent stage. Furthermore, since prior review articles have provided general overviews of 2D materials or specifically focused on charge transport in graphene, here we instead highlight charge transport mechanisms in post-graphene 2D materials with particular emphasis on transition metal dichalcogenides and black phosphorus. For these systems, we delineate the intricacies of electronic transport including bandstructure control with thickness and external fields, valley polarization, scattering mechanisms, electrical contacts, and doping. In addition, electronic interactions between 2D materials are considered in the form of van der Waals heterojunctions and composite films. This review concludes with a perspective on the most promising future directions in this fast-evolving field.