Electronic Phase Separation in the Hexagonal Perovskite Ba3SrMo2O9

S. Simpson, Sacha Fop, H.A. Hopper, Gavin B. G. Stenning, Clemens Ritter, Abbie McLaughlin* (Corresponding Author)

*Corresponding author for this work

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3 Citations (Scopus)
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Competition between exotic magnetic and electronic ground states underpins the properties of strongly correlated transition metal oxides and can result in electronic phase separation (EPS). The 6H-perovskite Ba3SrMo2O9 exhibits no magnetic order down to 1.6 K and EPS is observed at 230 K. The ground state of this material contains a complex mixture of spin-singlet Mo2O9 dimers and quasi-molecular Mo2O9 clusters. Segregation in Ba3SrMo2O9 emerges due to competition between
direct Mo–Mo bonding and Mo–O–Mo magnetic superexchange, comprising a novel mechanism of electronic phase separation in transition metal oxides.
Original languageEnglish
Article number024401
JournalPhysical Review Materials
Issue number2
Early online date3 Feb 2022
Publication statusPublished - 3 Feb 2022

Bibliographical note

We thank the Carnegie Trust for the Universities of Scotland for a PhD Scholarship for S.S. We acknowledge STFC-GB for provision of beamtime at the ILL. We also thank Dr. Mark Senn (University of Warwick) for useful discussions.


  • Crystal structure
  • Exchange interaction
  • Exotic phases of matter
  • Phase separation
  • Quantum phase transitions
  • Second order phase transitions
  • Crystal structures
  • Crystallography
  • Magnetization measurements
  • Neutron diffraction


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