80 citations · 145 across the 6 of their papers we have counts for
6 papers
Comment on "The role of electron-electron interactions in two-dimensional Dirac fermions''
Stephan Hesselmann, Thomas C. Lang, Michael Schuler +2
Tang et al. [Science 361, 570 (2018)] report on the properties of Dirac fermions with both on-site and Coulomb interactions. The substantial decrease up to ~40% of the Fermi veloci…
Quantifying the fragility of unprotected quadratic band crossing points
Stephan Hesselmann, Carsten Honerkamp, Stefan Wessel +1
We examine a basic lattice model of interacting fermions that exhibits quadratic band crossing points (QBCPs) in the non-interacting limit. In particular, we consider spinless ferm…
Torus Spectroscopy of the Gross-Neveu-Yukawa Quantum Field Theory: Free Dirac versus Chiral Ising Fixed Point
Michael Schuler, Stephan Hesselmann, Seth Whitsitt +3
We establish the universal torus low-energy spectra at the free Dirac fixed point and at the strongly coupled chiral Ising fixed point and their subtle crossover behaviour in the G…
Bond-ordered states and -wave pairing of spinless fermions on the honeycomb lattice
Stephan Hesselmann, Daniel D. Scherer, Michael M. Scherer +1
Spinless fermions on the honeycomb lattice with repulsive nearest-neighbor interactions are known to harbour a quantum critical point at half-filling, with critical behaviour in th…
Thermal Ising transitions in the vicinity of two-dimensional quantum critical points
Stephan Hesselmann, Stefan Wessel
The scaling of the transition temperature into an ordered phase close to a quantum critical point as well as the order parameter fluctuations inside the quantum critical region pro…
Finite-size effects in Luther-Emery phases of Holstein and Hubbard models
J. Greitemann, S. Hesselmann, S. Wessel +2
The one-dimensional Holstein model and its generalizations have been studied extensively to understand the effects of electron-phonon interaction. The half-filled case is of partic…