Depth dependence of itinerant character in Mn-substituted Sr3Ru2O7

Details Depth dependence of itinerant character in Mn-substituted Sr3Ru2O7 Depth dependence of itinerant character in Mn-substituted Sr3Ru2O7

2011-06-15

arxiv.org/abs/1106.2929v1

New J. Phys 13, 053059 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

10 pages, 4 figures, 1 table

Scientific paper

10.1088/1367-2630/13/5/053059

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.

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