RESONANT SOFT X RAY SCATTERING : A NEW TOOL FOR STRUCTURAL STUDIES OF CONDENSED MATTER SYSTEMS

G.A.Sawatzky (Univ. of British Columbia, Vancouver, Canada)

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 superconducting, and novel magnetic systems. The new beamline being constructed at the Canadian light source will include full polarization control opening up new areas of research including coherent scattering on biological systems.

Recently published papers in this area are:

Quantum melting of the Wigner crystal in the spin ladder compound Sr1-xCaxCu24O41, Rusydi et al Phys. Rev. Lett. In press
Spatially modulated "Mottness" in La2-xBaxCuO4
, Abbamonte et al; Nature Physics 1, 155 (2005)
Crystallization of charge holes in the spin ladder Sr14Cu24O4
, Abbamonte et al Nature 431 1078 (2004)
soft x-ray resonant diffraction study of magnetic and orbital correlations in a Manganite near half filling
, Thomas et al. Phys. Rev. Lett. 92, 237204, ( 2004)
A structural probe of the doped holes in copper-oxide superconductors, Abbamonte et al., Science 297, 581 (2002)