Magnetic Superstructure and Metal-Insulator Transition in Mn-Substituted Sr3Ru2O7
M.A. Hossain, B. Bohnenbuck, Y.-D. Chuang, A.G. Cruz Gonzalez, I., Zegkinoglou, M.W. Haverkort, J. Geck, D.G. Hawthorn, H.-H. Wu, C., Schussler-Langeheine, R. Mathieu, Y. Tokura, S. Satow, H. Takagi, Y. Yoshida,, J.D. Denlinger, I.S. Elfimov, Z. Hussain, B. Keimer, G.A. Sawatzky
TL;DR
This study investigates the metal-insulator transition in Mn-substituted Sr3Ru2O7 using resonant elastic soft x-ray scattering, revealing inhomogeneous magnetic superstructure formation and a low impurity threshold for transition percolation.
Contribution
It provides new insights into the inhomogeneous nature of the transition and the role of Mn impurities using REXS at Ru and Mn edges.
Findings
Detection of magnetic superstructure reflections below transition temperature.
Identification of inhomogeneous transition with low Mn impurity threshold.
Modeling of REXS intensity supports percolation-based transition mechanism.
Abstract
We present a temperature-dependent resonant elastic soft x-ray scattering (REXS) study of the metal-insulator transition in Sr3(Ru1-xMnx)2O7, performed at both Ru and Mn L-edges. Resonant magnetic superstructure reflections, which indicate an incipient instability of the parent compound, are detected below the transition. Based on modelling of the REXS intensity from randomly distributed Mn impurities, we establish the inhomogeneous nature of the metal-insulator transition, with an effective percolation threshold corresponding to an anomalously low x<0.05 Mn substitution.
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Taxonomy
TopicsAdvanced Condensed Matter Physics · Theoretical and Computational Physics · Multiferroics and related materials