196 citations · 2.6k across the 56 of their papers we have counts for
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Phase diagrams of SO() Majorana-Hubbard models: Dimerization, internal symmetry breaking, and fluctuation-induced first-order transitions
Lukas Janssen, Urban F. P. Seifert
We study the zero-temperature phase diagrams of Majorana-Hubbard models with SO() symmetry on two-dimensional honeycomb and -flux square lattices, using mean-field and renorm…
Nematic Quantum Criticality in Dirac Systems
Jonas Schwab, Lukas Janssen, Kai Sun +4
We investigate nematic quantum phase transitions in two different Dirac fermion models. The models feature twofold and fourfold, respectively, lattice rotational symmetries that ar…
Metallic and Deconfined Quantum Criticality in Dirac Systems
Zi Hong Liu, Matthias Vojta, Fakher F. Assaad +1
Motivated by the physics of spin-orbital liquids, we study a model of interacting Dirac fermions on a bilayer honeycomb lattice at half filling, featuring an explicit global SO(3)$…
Nesting instability of gapless U(1) spin liquids with spinon Fermi pockets in two dimensions
Wilhelm G. F. Krüger, Lukas Janssen
Quantum spin liquids are exotic states of matter that may be realized in frustrated quantum magnets and feature fractionalized excitations and emergent gauge fields. Here, we consi…
Gross-Neveu-Heisenberg criticality from competing nematic and antiferromagnetic orders in bilayer graphene
Shouryya Ray, Lukas Janssen
We study the phase diagram of an effective model of competing nematic and antiferromagnetic orders of interacting electrons on the Bernal-stacked honeycomb bilayer, as relevant for…
Fractionalized quantum criticality in spin-orbital liquids from field theory beyond the leading order
Shouryya Ray, Bernhard Ihrig, Daniel Kruti +3
Two-dimensional spin-orbital magnets with strong exchange frustration have recently been predicted to facilitate the realization of a quantum critical point in the Gross-Neveu-SO(3…