An effect of the uniaxial strain on the temperature of Bose-Einstein condensation of the intersite bipolarons
Abstract
We have studied an effect of uniaxial strain to the temperature of Bose-Einstein condensation of intersite bipolarons within the framework of Extended Holstein-Hubbard model. Uniaxial lattice strains are taken into an account by introducing a generalized density-displacement type force for electron-lattice interaction. Associating the superconducting critical temperature Tc with the temperature of Bose-Einstein condensation TBEC of intersite bipolarons we have calculated strain derivatives of TBEC and satisfactorily explained the results of the experiments on La-based high-Tc films.
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