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.
@article{arxiv.0906.0035,
title = {Magnetic Superstructure and Metal-Insulator Transition in Mn-Substituted Sr3Ru2O7},
author = {M. A. Hossain and B. Bohnenbuck and Y. -D. Chuang and A. G. Cruz Gonzalez and I. Zegkinoglou and M. W. Haverkort and J. Geck and D. G. Hawthorn and H. -H. Wu and C. Schussler-Langeheine and R. Mathieu and Y. Tokura and S. Satow and H. Takagi and Y. Yoshida and J. D. Denlinger and I. S. Elfimov and Z. Hussain and B. Keimer and G. A. Sawatzky and A. Damascelli},
journal= {arXiv preprint arXiv:0906.0035},
year = {2009}
}
Comments
A high-resolution version can be found at http://www.physics.ubc.ca/~quantmat/ARPES/PUBLICATIONS/Articles/MnSRO_REXS.pdf