Jahn-Teller Impurity States in LaSrCuO: XAFS Evidence and Implications for High Tc Superconductivity

V. Polinger, D. Haskel, E. A. Stern

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…