Ordering Phenomena in Transition Metal Oxides

Resonant soft X-ray scattering studies of the doped hole density distribution in high-temperature superconductors   

Recent advances in synchrotron radiation facilities and in the theoretical understanding of X-ray spectroscopy of atoms, molecules and solids has opened the door to combining X-ray spectroscopy with X-ray scattering to obtain a detailed picture of the charge spin and orbital spatial distribution with extreme sensitivity. I will introduce the basic ideas involved in this new resonant X-ray scattering technique and then show some examples of recent work on the spin density and doped hole density distribution in high-T_c superconductors and related materials as well as some Manganites. I will also describe our search for stripes in the charge channel and the search for chemical inhomogeneities.
Recent publications are:
[1] P. Abbamonte, L. Venema, A. Rusydi, G.A. Sawatzky, G. Logvenov, and I. Bozovic, Science 2002 July 26; 297:581-584.
[2] A Structural Probe of the Doped Holes in Cuprate Superconductors, D.L. Feng et al ., cond-mat/0402488.