The polarisation dependent X-ray absorption measurements (XAS) have been made below the transition temperature of Bi2Sr2CaCu2O2+y (Bi2212) superconducting system. The results suggest a negligible amount of Cu 3dz2-r2 symmetry holes but give a strong evidence of presence of a significant amount of pz symmetry holes. The polarisation dependent Cu L3 and O K spectra are reported both in superconducting as well as in normal state of the Bi2212 system.
The Out-of-Plane Cu 3d and O 2p Holes in the Bi2212 System / Saini, Naurang Lal; D. S. L., Law; A., Menovsky; J. J. M., Franse; K. B., Garg. - In: PHYSICA. C, SUPERCONDUCTIVITY. - ISSN 0921-4534. - STAMPA. - 235-240(1995), pp. 1017-1018. [10.1016/0921-4534(94)91733-7]