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

S Hesselmann; T C Lang; M Schuler; S Wessel; A M Läuchli

doi:10.1126/science.aav6869

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

Science. 2019 Dec 6;366(6470):eaav6869. doi: 10.1126/science.aav6869.

Authors

S Hesselmann¹, T C Lang², M Schuler², S Wessel¹, A M Läuchli³

Affiliations

¹ Institute for Theoretical Solid State Physics, JARA-FIT and JARA-HPC, RWTH Aachen University, 52056 Aachen, Germany.
² Institute for Theoretical Physics, University of Innsbruck, 6020 Innsbruck, Austria.
³ Institute for Theoretical Physics, University of Innsbruck, 6020 Innsbruck, Austria. [email protected].

PMID: 31806785
DOI: 10.1126/science.aav6869

Abstract

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.

Publication types

Comment