Comprehensive Modeling of Graphene Resistivity

TL;DR

This paper revises and compares various resistivity models for graphene, demonstrating that optical phonon emission scattering is suppressed in low-field, low-temperature conditions, and identifies the most accurate models based on experimental data.

Contribution

It provides a comprehensive evaluation of scattering mechanisms in graphene and clarifies discrepancies in existing resistivity models, proposing the most accurate ones based on experimental fitting.

Findings

Optical phonon emission scattering is suppressed at low fields and temperatures.

Certain existing models are inconsistent with experimental data.

The paper identifies the best scattering models for graphene resistivity.

Abstract

Since the first graphene layer was fabricated in the early 2000's, graphene properties have been studied extensively both experimentally and theoretically. However, when comparing the many resistivity models reported in literature, several discrepancies can be found, as well as a number of inconsistencies between formulas. In this paper, we revise the main scattering mechanisms in graphene, based on theory and goodness of fit to in-house experimental data. In particular, a step-by-step evaluation of the interaction between electrons and optical phonons is carried out, where we demonstrate that the process of optical phonon emission scattering is completely suppressed for all low-field applications and all temperatures in the range of interest, as opposed to what is often reported in literature. Finally, we identify the best scattering models based on the goodness of fit to experimental data.