Non-Fermi liquid behavior at the onset of incommensurate 2k_F charge or spin density wave order in two dimensions

Abstract

We analyze the influence of quantum critical fluctuations on single-particle excitations at the onset of incommensurate $2k_F$ charge or spin density wave order in two-dimensional metals. The case of a single pair of hot spots at high symmetry positions on the Fermi surface needs to be distinguished from the case of two hot spot pairs. We compute the fluctuation propagator and the electronic self-energy perturbatively in leading order. The energy dependence of the single-particle decay rate at the hot spots obeys non-Fermi liquid power laws, with an exponent 2/3 in the case of a single hot spot pair, and exponent one for two hot spot pairs. The prefactors of the linear behavior obtained in the latter case are not particle-hole symmetric.

5 pages, 2 figures

References in corpus (4)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Quantum phase transitions of metals in two spatial dimensions: II. Spin density wave order
• Instabilities near the onset of spin density wave order in metals
• Breakdown of Fermi liquid behavior at the (π,π)=2k_F spin-density wave quantum-critical point: the case of electron-doped cuprates

Cited by in corpus (14)

• Anisotropic Non-Fermi Liquids
• Specific Heat of a Quantum Critical Metal
• Non-Fermi-Liquid Behavior from Cavity Electromagnetic Vacuum Fluctuations at the Superradiant Transition
• Incommensurate $2k_F$ density wave quantum criticality in two dimensional metals
• Strange metal from incoherent bosons
• Stable non-Fermi liquid fixed point at the onset of incommensurate $2k_F$ charge density wave order
• Kohn anomalies in momentum dependence of magnetic susceptibility of some three-dimensional systems
• Non Fermi liquid behavior at flat hot spots from quantum critical fluctuations at the onset of charge- or spin-density wave order
• Fluctuation effects at the onset of $2{\mathbf{k}}_{\mathbf{F}}$ density wave order with two pairs of hot spots in two-dimensional metals
• Induction of non-Fermi liquids by critical cavity photons at the onset of superradiance
• Pseudogap and strange metal states in the square-lattice Hubbard model: A comprehensive study
• Marginal Fermi liquid behavior at the onset of $2{\mathbf{k}}_{\mathbf{F}}$ density wave order in two-dimensional metals with flat hot spots
• Non-Fermi liquid behaviour of CDW instabilities in fractionally-filled moiré flatbands
• Superconductivity near an Ising nematic quantum critical point in two dimensions