196 citations · 2.6k across the 56 of their papers we have counts for
4 papers · 1 filter
Phase diagram of electronic systems with quadratic Fermi nodes in : expansion, expansion, and functional renormalization group
Lukas Janssen, Igor F. Herbut
Several materials in the regime of strong spin-orbit interaction such as HgTe, the pyrochlore iridate PrIrO, and the half-Heusler compound LaPtBi, as well as various sy…
Honeycomb-lattice Heisenberg-Kitaev model in a magnetic field: Spin canting, metamagnetism, and vortex crystals
Lukas Janssen, Eric C. Andrade, Matthias Vojta
The Heisenberg-Kitaev model is a paradigmatic model to describe the magnetism in honeycomb-lattice Mott insulators with strong spin-orbit coupling, such as AIrO (A = Na, Li…
Critical O(N) models above four dimensions: Small-N solutions and stability
Astrid Eichhorn, Lukas Janssen, Michael M. Scherer
We explore O(N) models in dimensions . Specifically, we investigate models of an O(N) vector field coupled to an additional scalar field via a cubic interaction. Recent resu…
Spontaneous breaking of Lorentz symmetry in -dimensional QED
Lukas Janssen
The phase diagram of massless quantum electrodynamics in three space-time dimensions as a function of fermion flavor number exhibits two well-known phases: at large $N > N_c^{c…