5 papers
Fermionic criticality of anisotropic nodal point semimetals away from the upper critical dimension: exact exponents
Mikolaj D. Uryszek, Frank Krüger, Elliot Christou
We consider the fermionic quantum criticality of anisotropic nodal point semimetals in spatial dimensions that disperse linearly in dimensions, and quadratica…
Novel criticality of Dirac fermions in the presence of emergent gauge fields
Elliot Christou, Fernado de Juan, Frank Krüger
We consider spontaneous symmetry breaking transitions of strongly interacting two-dimensional Dirac fermions minimally coupled to mass and emergent gauge field order parameters. Us…
Quantum Criticality of Semi-Dirac Fermions in 2+1 Dimensions
Mikolaj D. Uryszek, Elliot Christou, Akbar Jaefari +2
Two-dimensional semi-Dirac fermions are quasiparticles that disperse linearly in one direction and quadratically in the other. We investigate instabilities of semi-Dirac fermions t…
Novel criticality of Dirac fermions from lattice symmetry breaking
Elliot Christou, Fernado de Juan, Frank Krüger
We consider the role of spontaneous lattice symmetry breaking in strongly interacting two dimensional Dirac systems. The fermion induced quantum (multi-)criticality is described by…
Hidden Charge Order of Interacting Dirac Fermions on the Honeycomb Lattice
Elliot Christou, Bruno Uchoa, Frank Krüger
We consider the extended half-filled Hubbard model on the honeycomb lattice for second nearest neighbors interactions. Using a functional integral approach, we find that collective…