We present a core-level photoemission study of Sr3(Ru 1-xMnx)2O7, in which we monitor the evolution of the Ru-3d fine structure versus Mn substitution and probing depth. In both Ru 3d3/2 and 3d5/2 core levels we observe a clear suppression of the metallic features, i.e. the screened peaks, implying a sharp transition from itinerant to localized character already at low Mn concentrations. The comparison between soft and hard x-ray photoemission, which provides tunable depth sensitivity, reveals that the degree of localized/metallic character for Ru is different at the surface than in the bulk.
Cite
@article{arxiv.1106.2929,
title = {Depth dependence of itinerant character in Mn-substituted Sr3Ru2O7},
author = {G Panaccione and U Manju and F Offi and E Annese and I Vobornik and P Torelli and Z H Zhu and M A Hossain and L Simonelli and A Fondacaro and P Lacovig and A Guarino and Y Yoshida and G A Sawatzky and A Damascelli},
journal= {arXiv preprint arXiv:1106.2929},
year = {2011}
}