Persistent semi-metal-like nature of epitaxial perovskite CaIrO{sub 3} thin films

Journal Article · Thu May 21 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4921460· OSTI ID:22410232

Biswas, Abhijit

Strong spin-orbit coupled 5d transition metal based ABO{sub 3} oxides, especially iridates, allow tuning parameters in the phase diagram and may demonstrate important functionalities, for example, by means of strain effects and symmetry-breaking, because of the interplay between the Coulomb interactions and strong spin-orbit coupling. Here, we have epitaxially stabilized high quality thin films of perovskite (Pv) CaIrO{sub 3}. Film on the best lattice-matched substrate shows semi-metal-like characteristics. Intriguingly, imposing tensile or compressive strain on the film by altering the underlying lattice-mismatched substrates still maintains semi-metallicity with minute modification of the effective correlation as tensile (compressive) strain results in tiny increases (decreases) of the electronic bandwidth. In addition, magnetoresistance remains positive with a quadratic field dependence. This persistent semi-metal-like nature of Pv-CaIrO{sub 3} thin films with minute changes in the effective correlation by strain may provide new wisdom into strong spin-orbit coupled 5d based oxide physics.

• OSTI ID: 22410232
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 19; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALCIUM COMPOUNDS
CORRELATIONS
COULOMB FIELD
CRYSTAL DEFECTS
EPITAXY
IRIDIUM OXIDES
L-S COUPLING
MAGNETORESISTANCE
METALLICITY
PHASE DIAGRAMS
STRAINS
SUBSTRATES
SYMMETRY BREAKING
TENSILE PROPERTIES
THIN FILMS