The effect of quantum fluctuations of the phonon field on the ground-state character of one-dimensional electron-phonon systems is studied with a numerical simulation technique. Two different electron-phonon models are studied, both for spinless and spin-1/2 electrons, in the half-filled-band case. In both models, it is found that in the spinless case quantum fluctuations destroy the long-range dimerization order for small electron-phonon coupling constant ≫. For the spin-1/2 case, the results are consistent with the Peierls transition occurring at ≫=0.
ASJC Scopus subject areas
- Physics and Astronomy(all)