Comment on "The role of electron-electron interactions in two-dimensional Dirac fermions"

Tang et al. (Research Articles, 10 August 2018, p. 570) report on the properties of Dirac fermions with both on-site and Coulomb interactions. The substantial decrease, up to ~40%, of the Fermi velocity of Dirac fermions with on-site interaction is inconsistent with the numerical data near the Gross-Neveu quantum critical point. This results from an inappropriate finite-size extrapolation.

Source: ScienceNOW - December 4, 2019 Category: Science Authors: Hesselmann, S., Lang, T. C., Schuler, M., Wessel, S., Läuchli, A. M. Tags: Online Only, Physics t-comment Source Type: news