Abstract
We present a temperature-dependent x-ray-absorption (XAS) and resonant elastic x-ray scattering (REXS) study of the metal-insulator transition (MIT) in Sr(RuMn)O. The XAS results reveal that the MIT drives the onset of local antiferromagnetic correlations around the Mn impurities, a precursor of the long-range antiferromagnetism detected by REXS at . This establishes that the MIT is of the Mott type (electronic correlations) as opposed to Slater type (magnetic order). While this behavior is induced by Mn impurities, the order exists for a wide range of Mn concentrations, and points to an inherent instability of SrRuO.
- Received 17 March 2012
DOI:https://doi.org/10.1103/PhysRevB.86.041102
©2012 American Physical Society