Signatures of electronic excitations in the Raman spectra of graphene materials

Student thesis: Doctoral ThesisPhD

Abstract

In this thesis, we present the tight binding method to describe electronic properties of graphene. We begin with a theoretical description of electronic Raman scattering (ERS) in graphene, under the framework of time-dependent perturbation theory. Our original work is presented in chapters 4, 5 and 6. In each chapter, we model the Raman spectra of graphene-based systems of special interest in carbon research: superconducting graphene, graphite and twisted bilayer graphene. Our findings underpin that purely electronic excitations in Raman spectra generate distinctive features that allows us to characterise and study these materials. In particular, Raman spectra give us insights into the position of van Hove singularities, the size of gaps or the flatness of bands. At the end of each chapter, we provide additional information about the current experimental status.
Date of Award24 Jun 2020
Original languageEnglish
Awarding Institution
  • University of Bath
SupervisorMarcin Mucha-Kruczynski (Supervisor) & Stephen Clark (Supervisor)

Keywords

  • Graphene
  • Raman
  • Superconductivity
  • graphite
  • twisted bilayer graphene

Cite this

Signatures of electronic excitations in the Raman spectra of graphene materials
Garcia-Ruiz, A. (Author). 24 Jun 2020

Student thesis: Doctoral ThesisPhD