Lattice distortions and the metal-insulator transition in pure and Ti-substituted Ca3Ru2O7

V. Petkov, T. Durga Rao, A. Zafar, A. M.Milinda Abeykoon, E. Fletcher, J. Peng, Z. Q. Mao, X. Ke

Research output: Contribution to journalArticlepeer-review

Abstract

We report pair distribution function studies on the relationship between the metal-insulator transition (MIT) and lattice distortions in pure and Ti-substituted bilayer Ca3Ru2O7. Structural refinements performed as a function of temperature, magnetic field and length scale reveal the presence of lattice distortions not only within but also orthogonal to the bilayers. Because of the distortions, the local and average crystal structure differ across a broad temperature region extending from room temperature to temperatures below the MIT. The coexistence of distinct lattice distortions is likely to be behind the marked structural flexibility of Ca3Ru2O7 under external stimuli. This observation highlights the ubiquity of lattice distortions in an archetypal Mott system and calls for similar studies on other families of strongly correlated materials.

Original languageEnglish
Article number015402
JournalJournal of Physics: Condensed Matter
Volume35
Issue number1
DOIs
StatePublished - Jan 11 2023

Keywords

  • distortions
  • lattice
  • metal-insulator transition
  • strongly correlated systems

Fingerprint

Dive into the research topics of 'Lattice distortions and the metal-insulator transition in pure and Ti-substituted Ca3Ru2O7'. Together they form a unique fingerprint.

Cite this