X-Ray Resonant Scattering as a Direct Probe of Orbital Ordering in Transition-Metal Oxides

Details X-Ray Resonant Scattering as a Direct Probe of Orbital Ordering in Transition-Metal Oxides X-Ray Resonant Scattering as a Direct Probe of Orbital Ordering in Transition-Metal Oxides

1997-10-22

arxiv.org/abs/cond-mat/9710232v1

Physics

Condensed Matter

Strongly Correlated Electrons

LaTex using RevTex, 4 pages and two included postscript figures

Scientific paper

10.1103/PhysRevLett.80.3400

X-ray resonant scattering at the K-edge of transition metal oxides is shown to measure the orbital order parameter, supposed to accompany magnetic ordering in some cases. Virtual transitions to the 3d-orbitals are quadrupolar in general. In cases with no inversion symmetry, such as V$_2$O$_3$, treated in detail here, a dipole component enhances the resonance. Hence, we argue that the detailed structure of orbital order in V$_2$O$_3$ is experimentally accessible.

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