Electronic Structure and the Properties of Phosphorene Systems

TL;DR

This paper reviews the electronic structure and recent research progress of phosphorene, highlighting its unique properties, effects of external fields, and its significance in semiconductor physics at the atomic layer scale.

Contribution

It combines a qualitative LCAO model analysis with a comprehensive review of recent experimental and theoretical studies on phosphorene.

Findings

Identification of midgap edge states in phosphorene

Effects of electric and magnetic fields on electronic structure

Recent advancements in phosphorene research

Abstract

A single atomic layer of black phosphorus, phosphorene, was experimentally realized in 2014. It has a puckered honeycomb lattice structure and a semiconducting electronic structure. In the first part of this paper, we use a simple LCAO model, and discuss qualitatively the electronic structure of phosphorene systems under electric and magnetic fields, especially, noting their midgap edge states. The next part is spent for the review of the research progress on phosphorene in the past one year since its appearance in 2014. Phosphorene has been a typical object to study the semiconductor physics in atomic layers.