Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2012-02-03
Physics
Condensed Matter
Strongly Correlated Electrons
25 pages, 10 figures
Scientific paper
While many physical properties of graphene can be understood qualitatively on the basis of bare Dirac bands, there is specific evidence that electron-electron (EE) and electron-phonon (EP) interactions can also play an important role. We discuss strategies for extracting separate images of the EE and EP interactions as they present themselves in the electron spectral density and related self-energies. While for momentum, $k$, equal to its Fermi value, $k_F$, a composite structure is obtained which can be difficult to separate into its two constituent parts, at smaller values of $k$ the spectral function shows distinct incoherent sidebands on the left and right of the main quasiparticle line. These image respectively the EE and EP interactions, each being most prominent in its own energy window. We employ a maximum entropy inversion technique on the self energy to reveal the electron-phonon spectral density separate from the excitation spectrum due to coulomb correlations. Our calculations show that this technique can provide important new insights into inelastic scattering processes in graphene.
Carbotte Jules P.
Hwang Jungseek
LeBlanc J. P. F.
No associations
LandOfFree
Distinguishing Coulomb and electron-phonon interactions for massless Dirac fermions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Distinguishing Coulomb and electron-phonon interactions for massless Dirac fermions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distinguishing Coulomb and electron-phonon interactions for massless Dirac fermions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-4482