Projects per year
Perovskite SrIrO3 films and its heterostructures are very promising, yet less researched, avenues to explore interesting physics originating from the interplay between strong spin-orbit coupling and electron correlations. Elemental iridium is a commonly used source for molecular beam epitaxy (MBE) synthesis of SrIrO3 films. However, elemental iridium is extremely difficult to oxidize and evaporate while maintaining an ultra-high vacuum and a long mean free path. Here, we calculated a thermodynamic phase diagram to highlight these synthesis challenges for phase-pure SrIrO3 and other iridium-based oxides. We addressed these challenges using a novel solid-source metal-organic MBE approach that rests on the idea of modifying the metal-source chemistry. Phase-pure, single-crystalline, coherent, epitaxial (001)pc SrIrO3 films on (001) SrTiO3 substrate were grown. Films demonstrated semi-metallic behavior, Kondo scattering, and weak antilocalization. Our synthesis approach has the potential to facilitate research involving iridate heterostructures by enabling their atomically precise syntheses.
Bibliographical noteFunding Information:
This work was supported by the Air Force Office of Scientific Research (AFOSR) through Grant Nos. FA9550-21-1-0025 and FA9550-21-0460 and from the NSF through the MRSEC program under Award No. DMR-2011401. R.C. also acknowledges partial support from the U.S. Department of Energy (DOE) through Grant No. DE-SC0020211. Parts of this work were carried out at the Characterization Facility, University of Minnesota, which receives partial support from the NSF through the MRSEC program under Award No. DMR-2011401. Substrate preparation was carried out at the Minnesota Nano Center, which is supported by the NSF through the National Nanotechnology Coordinated Infrastructure under Award No. ECCS-2025124.
© 2022 Author(s).
FingerprintDive into the research topics of 'Semi-metallic SrIrO3 films using solid-source metal-organic molecular beam epitaxy'. Together they form a unique fingerprint.
- 2 Active
9/1/20 → 8/31/26
Project: Research project
Supporting data for "Semi-metallic SrIrO3 films using solid-source metal-organic molecular beam epitaxy"
Choudhary, R., Nair, S., Yang, Z., Lee, D. & Jalan, B., Data Repository for the University of Minnesota (DRUM), 2023