Inductive crystal field control in layered metal oxides with correlated electrons
- Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA
- School of Engineering, University of St. Thomas, St. Paul, Minnesota 55105, USA, Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA, Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA
Here, we show that the NiO6 crystal field energies can be tailored indirectly via heterovalent A cation ordering in layered (La,A) NiO4 Ruddlesden-Popper (RP) oxides, where A = Sr, Ca, or Ba, using density functional calculations. We leverage as a driving force the electrostatic interactions between charged [LaO]1+ and neutral [AO]0 planes to inductively tune the Ni-O bond distortions, without intentional doping or epitaxial strain, altering the correlated d-orbital energies. We use this strategy to design cation ordered LaCaNiO4 and LaBaNiO4 with distortions favoring enhanced Ni eg orbital polarization, and find local electronic structure signatures analogous to those in RP La-cuprates, i.e., parent phases of the high-temperature superconducting oxides.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Materials Sciences and Engineering Division; U.S. Department of Defense (DOD), Defense Advanced Research Projects Agency (DARPA); US Department of the Navy, Office of Naval Research (ONR)
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1183242
- Alternate ID(s):
- OSTI ID: 1357896
- Journal Information:
- APL Materials, Journal Name: APL Materials Vol. 2 Journal Issue: 7; ISSN 2166-532X
- Publisher:
- American Institute of PhysicsCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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