An X-ray absorption study of the electric field effect mechanism in “123” cupratesN. B. Brookes, G. Ghiringhelli, J. C. Cezar, G. M. De Luca and M. SalluzzoEur. Phys. J. B, 70 2 (2009) 153-156DOI: https://doi.org/10.1140/epjb/e2009-00221-5