Linear response correlation functions in strained graphene

TL;DR

This paper derives a general relation for linear response functions in strained graphene and explores how strain affects electronic properties like plasmon dispersion, optical conductivity, and susceptibilities, highlighting anisotropic effects.

Contribution

It introduces a new theoretical framework linking response functions in strained and unstrained graphene and analyzes strain-dependent electronic properties.

Findings

Transverse plasmon mode shows anisotropic deviation due to strain

Strain influences optical conductivity and susceptibilities

Facilitates experimental detection of strain effects

Abstract

After deriving a general correspondence between linear response correlation functions in graphene with and without applied uniaxial strain, we study the dependence on the strain modulus and direction of selected electronic properties, such as the plasmon dispersion relation, the optical conductivity, as well as the magnetic and electric susceptibilities. Specifically, we find that the dispersion of the recently predicted transverse plasmon mode exhibits an anisotropic deviation from linearity, thus facilitating its experimental detection in strained graphene samples.