1. Department of Physics, University of Houston, Houston, Texas 77204, Department of Chemistry, University of Houston, Houston, Texas 77204, Texas Center for Superconductivity at the University of Houston (TcSUH), Houston, Texas 77204, European Synchrotron Radiation Facility (ESRF), Grenoble, France, Department of Physics, University of Texas, El Paso, Texas 79968, and Institute of Materials Science, Darmstadt University of Technology, 64291 Darmstadt, Germany