Transport in indium-decorated graphene

TL;DR

This study investigates how indium adatoms affect the electronic transport in graphene, revealing charge donation, increased impurity scattering, and altered quantum interference effects, with notable positive magnetoresistance observed.

Contribution

It provides new insights into how dilute indium adatoms modify graphene's transport properties, including charge transfer and quantum interference effects.

Findings

Indium adatoms donate electrons to graphene.

Positive magnetoresistance observed across a wide density range.

Quantum interference effects are significantly altered by indium adatoms.

Abstract

The electronic transport properties of single layer graphene having a dilute coating of indium adatoms has been investigated. Our studies establish that isolated indium atoms donate electrons to graphene and become a source of charged impurity scattering, affecting the conductivity as well as magnetotransport properties of the pristine graphene. Notably, a positive magnetoresistance is observed over a wide density range after In doping. The low field magnetoresistance carries signatures of quantum interference effects which are significantly altered by the adatoms.