Doping and dimensionality effects on the core-level spectra of layered ruthenates

Abstract

Core-level spectra of the Mn-doped Sr3Ru2O7 and Srn+1RunO3n+1 (n = 1, 2 and 3) crystals are investigated with X-ray photoelectron spectroscopy. Doping of Mn to Sr3Ru2O7 considerably affects the distribution of core-level spectral weight. The satellite of Ru 3d core levels exhibits a substantial change with doping, indicating an enhanced electron localization across the doping- induced metal-insulator transition. However, the Ru 3p core levels remain identical with Mn-doping, thus showing no sign of doping-induced multiple Ru valences. In the Srn+1RunO3n+1 (n = 1, 2 and 3), the Ru 3d core-level spectra are similar, indicating that the chemical bonding environment around Ru ions remains the same for different layered compounds. Meanwhile the Sr 3d shallow core levels shift to higher binding energy with increasing n, suggesting their participation in Sr-O bonding with structural evolution.

6 pages with 6 figures, to be published in PRB

References in corpus (5)

• Core-Level X-Ray Photoemission Satellites in Ruthenates: A New Mechanism Revealing the Mott Transition
• Competing Ground States in Triple-layered Sr4Ru3O10: Verging on Itinerant Ferromagnetism with Critical Fluctuations
• Impurity-induced transition to a Mott insulator in Sr${}_3$Ru${}_2$O${}_7$
• Crystal-field level inversion in lightly Mn-doped Sr3Ru2O7
• Unusual Oscillation in Tunneling Magnetoresistance near a Quantum Critical Point in Sr${}_3$Ru${}_2$O${}_7$

Cited by in corpus (3)

• Evolution of Structural and Physical Properties of Sr3(Ru1-xMnx)2O7 with Mn Concentration
• Spin dynamics and unconventional magnetism in insulating La${}_{(1-2x)}$Sr${}_{2x}$Co${}_{(1-x)}$Nb${}_x$O${}_3$
• Depth dependence of itinerant character in Mn-substituted Sr3Ru2O7