Abstract
Here, we consider an interacting electron-phonon system within the framework of extended Holstein-Hubbard model at strong enough electron-phonon interaction limit in which (bi)polarons are the essential quasiparticles of the system. It is assumed that the electron-phonon interaction is screened and its potential has Yukawa-type analytical form. An effect of screening of the electron-phonon interaction on the temperature of Bose-Einstein condensation of the intersite bipolarons is studied for the first time. It is revealed that the temperature of Bose-Einstein condensation of intersite bipolarons is higher in the system with the more screened electron-phonon interaction.
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Yavidov, B., Kurmantayev, A., Alimov, D. et al. Effect of screening of the electron-phonon interaction on the temperature of Bose-Einstein condensation of intersite bipolarons. Eur. Phys. J. B 86, 312 (2013). https://doi.org/10.1140/epjb/e2013-40037-0
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DOI: https://doi.org/10.1140/epjb/e2013-40037-0