Effect of hydrogen adsorption on the quasiparticle spectra of graphene

TL;DR

This study models how isolated hydrogen atoms adsorbed on graphene alter its electronic quasiparticle spectra, providing analytical tools for interpreting experimental spectroscopic data.

Contribution

It introduces an analytic Green's function approach to evaluate the local density of states and spectral function in hydrogen-doped graphene.

Findings

Analytic expressions for local density of states and spectral function.

Numerical evaluation and plotting of spectra.

Relevance for interpreting STM and ARPES data.

Abstract

We use the non-interacting tight-binding model to study the effect of isolated hydrogen adsorbates on the quasiparticle spectra of single-layer graphene. Using the Green's function approach, we obtain analytic expressions for the local density of states and the spectral function of hydrogen-doped graphene, which are also numerically evaluated and plotted. Our results are relevant for the interpretation of scanning tunneling microscopy and angle-resolved photoemission spectroscopy data of functionalized graphene.