Mass of a lattice polaron from extended Holstein model using Yukawa potential

Abstract

Renormalization of the mass of an electron is studied within the framework of the Extended Holstein model at strong coupling regime and nonadiabatic limit. In order to take into account an effect of screening of an electron-phonon interaction on a polaron it is assumed that the electron-phonon interaction potential has the Yukawa form and screening of the electron-phonon interaction is due to the presence of other electrons in a lattice. The forces are derived from the Yukawa type electron-phonon interaction potential. It is emphasized that the early considered screened force of Refs.\cite{kor-giant,spencer,hague-etal,hague-kor} is a particular case of the force deduced from the Yukawa potential and is approximately valid at large screening radiuses compared to the distances under consideration. The Extended Holstein polaron with the Yukawa type potential is found to be a more mobile than polaron studied in early works at the same screening regime.

References in corpus (4)

• Polaronic behavior of undoped high-Tc cuprates
• Quantum Monte Carlo and variational approaches to the Holstein model
• Superlight small bipolarons
• Bipolarons from long range interactions: Singlet and triplet pairs in the screened Hubbard-Froehlich model on the chain

Cited by in corpus (4)

• Two-dimensional Yukawa interaction driven by a nonlocal-Proca quantum electrodynamics
• An approach for studying the influence of uniaxial strain (pressure) on the temperature of the Bose-Einstein condensation of intersite bipolarons: possible implementation for RBa${}_2$Cu${}_3$O${}_{7-\delta }$ cuprates
• Effect of screening of the electron-phonon interaction on the temperature of Bose-Einstein condensation of intersite bipolarons
• Strain Fields and Critical Phenomena in Manganites I: Spin-Lattice Hamiltonians