Crystal-field level inversion in lightly Mn-doped Sr3Ru2O7

Abstract

Sr3(Ru1-xMnx)2O7, in which 4d-Ru is substituted by the more localized 3d-Mn, is studied by x-ray dichroism and spin-resolved density functional theory. We find that Mn impurities do not exhibit the same 4+ valence of Ru, but act as 3+ acceptors; the extra eg electron occupies the in-plane 3dx2-y2 orbital instead of the expected out-of-plane 3d3z2-r2. We propose that the 3d-4d interplay, via the ligand oxygen orbitals, is responsible for this crystal-field level inversion and the material's transition to an antiferromagnetic, possibly orbitally-ordered, low-temperature state.

A high-resolution version can be found at http://www.physics.ubc.ca/~quantmat/ARPES/PUBLICATIONS/Articles/MnSr3Ru2O7_XAS.pdf

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• Metamagnetism and critical fluctuations in high quality single crystals of the bilayer ruthenate Sr3Ru2O7
• Nature of Orbital Ordering in La_0.5Sr_1.5MnO_4 is Studied by Soft X-ray Linear Dichroism
• Multiple first-order metamagnetic transitions and quantum oscillations in ultrapure
• Impurity-induced transition to a Mott insulator in Sr${}_3$Ru${}_2$O${}_7$

Cited by in corpus (15)

• Spin-Orbital Order Modified by Orbital Dilution in Transition Metal Oxides: From Spin Defects to Frustrated Spins Polarizing Host Orbitals
• Evolution of Structural and Physical Properties of Sr3(Ru1-xMnx)2O7 with Mn Concentration
• Orbital order in La0.5Sr1.5MnO4: beyond a common local Jahn-Teller picture
• Long-range interactions in the effective low energy Hamiltonian of Sr2IrO4: a core level resonant inelastic x-ray scattering study
• High-pressure synthesis and spin glass behavior of a Mn/Ir disordered quadruple perovskite CaCu3Mn2Ir2O12
• Mott versus Slater-type metal-insulator transition in Mn-substituted Sr3Ru2O7
• Doping and dimensionality effects on the core-level spectra of layered ruthenates
• 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
• Depth dependence of itinerant character in Mn-substituted Sr3Ru2O7
• Spin, orbital and topological order in models of strongly correlated electrons
• Competing magnetic orders in quantum critical Sr${}_3$Ru${}_2$O${}_7$
• Origin of the different electronic structure of Rh- and Ru-doped Sr2IrO4
• Tipping the magnetic instability in paramagnetic Sr${}_3$Ru${}_2$O${}_7$ by Fe impurities
• Structural and magnetic field effects on spin fluctuations in Sr${}_3$Ru${}_2$O${}_7$