The quantum scattering time and its implications on scattering sources in graphene (Supplementary)

TL;DR

This paper investigates the quantum scattering time in graphene, analyzing various scattering sources and their effects, with detailed experimental procedures and implications for understanding charge impurity impacts.

Contribution

It provides a comprehensive analysis of scattering mechanisms in graphene, including impurity effects and substrate interactions, advancing understanding of quantum transport properties.

Findings

Quantified the quantum scattering time tau_q in graphene

Identified dominant scattering sources affecting charge mobility

Analyzed the impact of substrate impurities on scattering processes

Abstract

Supplementary Information Content: 1. Sample preparation; 2. Background subtraction of Shubnikov-de Haas (SdH) oscillations; 3. The effect of density inhomogeneity on the quantum scattering time tau_q; 4. Determine the concentration of charged impurity n_imp at a distance z; 5. Scattering from charges in the bulk of the SiO_2 substrate.