Influence of electron-hole drag on conductivity of neutral and gated graphene

TL;DR

This paper investigates how electron-hole mutual drag affects the conductivity and carrier mobility in monolayer and bilayer graphene, revealing significant impacts on current direction and transport properties.

Contribution

It introduces a detailed analysis of electron-hole drag effects on graphene conductivity, highlighting their influence on carrier mobility and current flow direction.

Findings

Electron-hole drag significantly affects carrier mobility.

Mutual drag can reverse current direction in bilayer graphene.

Drag effects are crucial for understanding graphene's transport properties.

Abstract

Conductivity of monolayer and two-layer graphene is considered with due regard for mutual drag of band electrons and holes. Search of contribution of the drag in conductivity shows that this effect can sufficiently influence on mobility of carriers, which belong to different groups and have different drift velocities. In two-layer system the mutual drag can even change the di-rection of partial current in separate layer.