Induction of non-Fermi liquids by critical cavity photons at the onset of superradiance
arXiv:2407.10963 · doi:10.1016/j.aop.2025.169925
Abstract
We investigate the emergence of a non-Fermi liquid (NFL) at a putative quantum critical point signalling the onset of superradiance, in a set-up involving cavity quantum electrodynamics. Although the finiteness of the cavity, being bounded by reflecting mirrors, endows the cavity photons with an effective mass, they become massless at the continuous phase-transition point. We consider the matter part coming from the fermions hopping on a honeycomb lattice near half-filling, featuring doped Dirac cones at two sets of inequivalent valleys. This choice is dictated by the presence of a fermion-boson interaction vertex, which can give rise to Landau damping of the critical bosons, eventually leading to an NFL phase for the fermions. To set up the quantum effective action, we identify the hot-spots of the generically anisotropic (trigonally-warped) Fermi surfaces, which give the sets of points having parallel/antiparallel tangent vectors. The cavity photons act as charge density wave (CDW) order parameters, connecting pairs of hot-spots belonging to the Fermi surface of a single valley. With these ingredients, we set upon identifying NFL phases, using the tools of dimensional regularization and renormalization-group-flow equations. Our final results indicate that stable NFL phases exist in the low-energy limit, for the projections of the flows along the CDW coupling constant.
journal version; a different CDW variation of arXiv:2403.02322
References in corpus (28)
- The electronic properties of graphene
- Quantum phase transitions of metals in two spatial dimensions: II. Spin density wave order
- Low energy effective theory of Fermi surface coupled with U(1) gauge field in 2+1 dimensions
- Cavity QED with Quantum Gases: New Paradigms in Many-Body Physics
- Cavity Quantum Materials
- Quantum critical behavior in itinerant electron systems -- Eliashberg theory and instability of a ferromagnetic quantum-critical point
- Instability toward Formation of Quasi-One-Dimensional Fermi Surface in Two-Dimensional t-J Model
- Quantum Electrodynamic Control of Matter: Cavity-Enhanced Ferroelectric Phase Transition
- Renormalization group theory of nematic ordering in d-wave superconductors
- Theory of the nodal nematic quantum phase transition in superconductors
- Superradiant phase transition in electronic systems and emergent topological phases
- Non-Fermi-liquid d-wave metal phase of strongly interacting electrons
- Quasi-Local Strange Metal
- Manipulating intertwined orders in solids with quantum light
- Renormalization group for phases with broken discrete symmetry near quantum critical points
- Long-range photon fluctuations enhance photon-mediated electron pairing and superconductivity
- Robust Marginal Fermi Liquid In Birefringent Semimetals
- Transport in the non-Fermi liquid phase of isotropic Luttinger semimetals
- Pairing in half-filled Landau level
- UV/IR Mixing In Non-Fermi Liquids: Higher-Loop Corrections In Different Energy Ranges
- Thermoelectric and thermal properties of the weakly disordered non-Fermi liquid phase of Luttinger semimetals
- Critical Fermi surfaces in generic dimensions arising from transverse gauge field interactions
- Non-Fermi liquid behavior at the onset of incommensurate 2k_F charge or spin density wave order in two dimensions
- Raman response and shear viscosity in the non-Fermi liquid phase of Luttinger semimetals
- Non-Fermi-Liquid Behavior from Cavity Electromagnetic Vacuum Fluctuations at the Superradiant Transition
- Valley-polarized nematic order in twisted moiré systems: In-plane orbital magnetism and non-Fermi liquid to Fermi liquid crossover
- Stable non-Fermi liquid fixed point at the onset of incommensurate charge density wave order
- Charge and spin density wave orders in field-biased Bernal bilayer graphene