Europhys. Lett.
Volume 73, Number 1, January 2006
Page(s) 121 - 127
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 02 December 2005
Europhys. Lett., 73 (1), pp. 121-127 (2006)
DOI: 10.1209/epl/i2005-10366-9

Correlation functions measured by indirect resonant inelastic X-ray scattering

J. van den Brink1, 2 and M. van Veenendaal3, 4

1  Institute-Lorentz for Theoretical Physics Universiteit Leiden - P.O. Box 9506 2300 RA Leiden, The Netherlands
2  Theoretical Physics, Institute for Molecules and Materials Radboud Universiteit Nijmegen - P.O. Box 9010, 6500 GL Nijmegen, The Netherlands
3  Department of Physics, Northern Illinois University - De Kalb, IL 60115, USA
4  Argonne National Laboratory - 9700 South Cass Avenue, Argonne, IL 60439, USA

received 24 August 2005; accepted in final form 4 November 2005
published online 2 December 2005

We express the cross-section for indirect resonant inelastic X-ray scattering in terms of an intrinsic dynamic correlation function of the system that is studied with this technique. We find that the cross-section is a linear combination of the charge response function and the dynamic longitudinal spin density correlation function of the electrons that couple to the core-hole. This result is asymptotically exact for both strong and weak local core-hole potentials. The relative charge and spin contribution to the inelastic spectral weight can be changed by varying the incident photon energy.

78.70.-g - Interactions of particles and radiation with matter.
78.70.Ck - X-ray scattering.

© EDP Sciences 2005