Pseudospin in optical and transport properties of graphene

TL;DR

This paper demonstrates how electron-electron interactions, influenced by substrate choice, can control pseudospin in graphene, affecting its optical and transport properties such as Hall current and optical absorption.

Contribution

It reveals that substrate manipulation can induce out-of-plane pseudospin components, enabling control over graphene's electronic and optical behaviors.

Findings

Out-of-plane pseudospin component can be induced in graphene.

Substrate changes can manipulate electron-electron interactions.

Pseudospin control leads to zero-field Hall current and polarization-sensitive absorption.

Abstract

We show that the pseudospin being an additional degree of freedom for carriers in graphene can be efficiently controlled by means of the electron-electron interactions which, in turn, can be manipulated by changing the substrate. In particular, an out-of-plane pseudospin component can occur leading to a zero-field Hall current as well as to polarization-sensitive interband optical absorption.