Interacting Electrons in Graphene: Fermi Velocity Renormalization and Optical Response

URN to cite this document:: urn:nbn:de:bvb:355-epub-388725
DOI to cite this document:: 10.5283/epub.38872

Stauber, T. ; Parida, P.

; Trushin, M. ; Ulybyshev, M. V.

; Boyda, D. L. ; Schliemann, J.

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Date of publication of this fulltext: 20 Mar 2019 12:53

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Abstract

We have developed a Hartree-Fock theory for electrons on a honeycomb lattice aiming to solve a longstanding problem of the Fermi velocity renormalization in graphene. Our model employs no fitting parameters (like an unknown band cutoff) but relies on a topological invariant (crystal structure function) that makes the Hartree-Fock sublattice spinor independent of the electron-electron interaction. ...