Approximate scaling relation for the anharmonic electron-phonon problem
arXiv:cond-mat/9906143 · doi:10.1103/PhysRevB.61.R838
Abstract
An approximate scaling relation is found for the transition temperature to a charge-density-wave instability in the anharmonic electron-phonon problem, which maps a wide range of interaction strengths, anharmonicities, and phonon frequencies onto a common functional form. The relation employs the wave-function renormalization parameter and is valid even for systems that are not Fermi liquids.
5 pages, 6 figures, ReVTeX