Lattice distortions and the metal–insulator transition in pure and Ti-substituted Ca3Ru2O7
- Central Michigan Univ., Mount Pleasant, MI (United States)
- Central Michigan Univ., Mount Pleasant, MI (United States); Gandhi Institute of Technology and Management (GITAM) (India)
- Brookhaven National Lab. (BNL), Upton, NY (United States). Photon Sciences Division
- Michigan State Univ., East Lansing, MI (United States)
- Southeast Univ., Nanjing (China)
- Pennsylvania State Univ., University Park, PA (United States)
Here, 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.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States); Central Michigan Univ., Mount Pleasant, MI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- Grant/Contract Number:
- SC0012704; SC0021973; SC0019259; DMR 1917579
- OSTI ID:
- 1974384
- Alternate ID(s):
- OSTI ID: 1991766
- Report Number(s):
- BNL-224397-2023-JAAM
- Journal Information:
- Journal of Physics. Condensed Matter, Vol. 35, Issue 1; ISSN 0953-8984
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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