  Polarized XAFS measurements on powder of LaSrCuO with aligned c-axes find
that apical oxygens neighboring only the Sr dopants have a double-site
distribution. This result requires that the doped holes reside in impurity
states peaked on the CuO6 octahedron neighboring the dopant (denoted as
Sr-octahedrons). A model of the double site is presented of two co-existing
spin differentiated (singlet and triplet) Jahn-Teller (JT) distortions of the
Sr-octahedrons induced by an extrinsic doped hole pairing with the intrinsic
hole. It is speculated that Bose-condensation of the singlet pairs, bound by
more than 0.1 eV, produces superconductivity.
