Influence of grain boundaries on the charge order formation in the high-temperature superconductor

The possibility of the formation of stripes in the high-temperature superconductor Y Ba 2 Cu 3 O 7 − δ (YBCO) due to interaction between the charged oxygen vacancies or di-vacancies is shown. The high-angle grain boundaries (GBs) regions are preferable places for this formation. The adsorption capability of high-angle GBs with respect to the stripe embryo formation is determined. It is shown that there is a proportional dependence between the repetition distance along the high-angle GBs and an energy advantage of the stripe embryo formation in GBs regions. It is expected that bi-crystals with a high-angle grain boundary inside are prospective objects for stripe investigations in YBCO.