2003/07/17 by S. Di Matteo, Yves Joly, Di Matteo, S. +11
Earth and Planetary Sciences · Engineering · Physics and Astronomy · #Crystallography and Radiation Phenomena #FOS: Physical sciences #Geophysical Methods and Applications #Geophysical and Geoelectrical Methods #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0307441
4 pages, 4 figures
arxiv created 2003/07/17 · openalex publication_date 2003/07/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A thorough tensor analysis of the Bragg-forbidden reflection (00.3)h in corundum systems having a global center of inversion, like V2O3 and α-Fe2O3, shows that anomalous x-ray resonant diffraction can access chiral properties related to the dipole-quadrupole (E1-E2) channel via an interference with the pure quadrupole-quadrupole (E2-E2) process. This is also confirmed by independent \it ab initio numerical simulations. In such a way it becomes possible, in this particular case, to estimate the intensity of the ``twisted'' trigonal crystal field (C3 symmetry) and, in general, to detect chiral quantities in systems where dichroic absorption techniques are ineffective.