Mott versus Slater-type metal-insulator transition in Mn-substituted Sr3Ru2O7

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 Sr3(Ru1-xMnx)2O7. 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 T_order<T_MIT. 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 (1/4,1/4,0) order exists for a wide range of Mn concentrations, and points to an inherent instability of the parent compound.

In press. A high-resolution version can be found at http://www.phas.ubc.ca/~quantmat/ARPES/PUBLICATIONS/Articles/MnSRO_REXS.pdf

References in corpus (3)

• Formation of a Nematic Fluid at High Fields in Sr3Ru2O7
• Crystal-field level inversion in lightly Mn-doped Sr3Ru2O7
• Depth dependence of itinerant character in Mn-substituted Sr3Ru2O7

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• Topological Gapless Phases in Non-Symmorphic Antiferromagnets
• Emergent charge order near the doping-induced Mott-insulating quantum phase transition in Sr${}_3$Ru${}_2$O${}_7$
• Electronic superlattice revealed by resonant scattering from random impurities in Sr3Ru2O7
• Charge transfer model for the electronic structure of layered ruthenates
• Tipping the magnetic instability in paramagnetic Sr${}_3$Ru${}_2$O${}_7$ by Fe impurities
• Mn-induced magnetic symmetry breaking and its correlation with the metal-insulator transition in bilayered Sr3(Ru1-xMnx)2O7
• Quantified Degeneracy, Entropy and Metal-Insulator Transition in Complex Transition-Metal Oxides