Effects of electron-phonon coupling range on the polaron formation

@article{Perroni2005EffectsOE,
  title={Effects of electron-phonon coupling range on the polaron formation},
  author={Carmine Antonio Perroni and Vittorio Cataudella and Giulio De Filippis and Vincenzo Marigliano Ramaglia},
  journal={Physical Review B},
  year={2005},
  volume={71},
  pages={054301}
}
The polaron features due to electron-phonon interactions with different coupling ranges are investigated by adopting a variational approach. The ground-state energy, the spectral weight, the average kinetic energy, the mean number of phonons, and the electron-lattice correlation function are discussed for the system with coupling to local and nearest-neighbor lattice displacements comparing the results with the long-range case. For large values of the coupling with nearest-neighbor sites, most… Expand
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