2024/08/12 by Iran Seydi, Saeed H. Abedinpour, Seydi, Iran +5
Materials Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Iron-based superconductors research #Physics of Superconductivity and Magnetism #Quantum Gases (cond-mat.quant-gas) #Strongly Correlated Electrons (cond-mat.str-el)
paper · pdf · doi:10.48550/arxiv.2408.06116
openalex publication_date 2024/08/12 · openalex created_date 2024/09/10 · openalex updated_date 2026/07/28
We analytically study the inelastic lifetime of quasiparticles due to particle-particle interactions in a three-dimensional Fermi liquid approaching a density-wave instability. Using the G0W approximation, we find that the softening of the dielectric function significantly enhances the quasiparticle decay rate near the instability. While the zero-temperature quasiparticle lifetime at the Fermi surface generally follows a |εk-ε\rm F|-α divergence with α=2, we observe α=0.5 at the instability point and α=1 within the density-wave phase. Moreover, we demonstrate that the renormalization constant Z is substantially suppressed as the instability is approached, enhancing the effective mass. We extend our analysis to ultra-cold Rydberg-dressed Fermi liquids, where the soft-core interactions promote density-wave instability, and find that our numerical G0W results are in excellent agreement with our analytic predictions for quasiparticle lifetime, renormalization constant, and effective mass.