Many-body effects in third harmonic generation of graphene

Third harmonic generation in graphene and few-layer graphite films

Nardeep Kumar,1 Jatinder Kumar,1 Chris Gerstenkorn,1 Rui Wang,1,2 Hsin-Ying Chiu,1 Arthur L. Smirl,2 and Hui Zhao1,* 1Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, USA 2Laboratory for Photonics and Quantum Electronics, University of Iowa, Iowa City, Iowa 52242, USA (Received 5 November 2012; revised manuscript received 13 February 2013; published 18 March 2013)

Many-body exchange-correlation effects in graphene

We calculate, within the leading-order dynamical-screening approximation, the electron self-energy and spectral function at zero temperature for extrinsic (or gated/doped) graphene. We also calculate hot carrier inelastic scattering due to electron–electron interactions in graphene. We obtain the inelastic quasiparticle lifetimes and associated mean free paths from the calculated self-energy. T...

Many-body effects in Auger electron emission from Graphene

Band structure and many body effects in graphene

We have determined the electronic bandstructure of clean and potassium-doped single layer graphene, and fitted the graphene π bands to a oneand three-near-neighbor tight binding model. We characterized the quasiparticle dynamics using angle resolved photoemission spectroscopy. The dynamics reflect the interaction between holes and collective excitations, namely plasmons, phonons, and electron-h...

Ab initio GW many-body effects in graphene.

We present an ab initio numerical many-body GW calculation of the band plot in freestanding graphene. We consider the full ionic and electronic structure introducing e-e interaction and correlation effects via a self-energy containing non-Hermitian and dynamical terms. With respect to the density-functional theory local-density approximation, the Fermi velocity is renormalized with an increase ...