Doping fluctuation-driven magneto-electronic phase separation in

C. He, S. El-Khatib, J. Wu, J. W. Lynn, H. Zheng, J. F. Mitchell, C. Leighton

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

In recent years it has become clear that complex oxides provide an exceptional platform for the discovery of new physics as well as a considerable challenge to our understanding of correlated electrons. The tendency of these materials to display nanoscale electronic and magnetic inhomogeneity is a good example. Here, we have applied a variety of experimental techniques to investigate this magneto-electronic phase separation in a model system - the doped cobaltite La1-xSrxCoO3. Comparing experimental data over a wide range of doping with statistical simulations, we conclude that the magneto-electronic inhomogeneity is driven solely by inevitable local compositional fluctuations at nanoscopic length scales. The phase separation is thus doping fluctuation-driven rather than electronically driven, meaning that more complex electronic phase separation models are not required to understand the observed phenomena in this material.

Original languageEnglish (US)
Article number27006
JournalEPL
Volume87
Issue number2
DOIs
StatePublished - 2009

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