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Here we consider an interacting electron-phonon system within the frameworkof extended Holstein-Hubbard model at strong enough electron-phonon interactionlimit in which (bi)polarons are the essential quasiparticles of the system. Itis assumed that the electron-phonon interaction is screened and its potentialhas Yukawa-type analytical form. An effect of screening of the electron-phononinteraction on the temperature of Bose-Einstein condensation of the intersitebipolarons is studied for the first time. It is revealed that the temperatureof Bose-Einstein condensation of intersite bipolarons is higher in the systemwith the more screened electron-phonon interaction.

Effect of screening of the electron-phonon interaction on the temperature of Bose-Einstein condensation of intersite bipolarons