Manipulating the metal-to-insulator transition and magnetic properties in manganite thin films via epitaxial strain
- Nanjing Univ. of Aeronautics and Astronautics (China)
- Univ. College London (United Kingdom)
- Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Diamond Light Source, Ltd.
- Max Planck Institute of Solid State Research, Stuttgart (Germany)
- National Univ. of Singapore (Singapore)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States); State Univ. of New York (SUNY), Buffalo, NY (United States)
- Xiamen Univ. (China)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- State Univ. of New York (SUNY), Buffalo, NY (United States)
- Univ. College London (United Kingdom); Science and Technology Facilities Council (STFC), Oxford (United Kingdom). Diamond Light Source, Ltd.
Strain engineering of epitaxial transition metal oxide heterostructures offers an intriguing opportunity to control electronic structures by modifying the interplay between spin, charge, orbital, and lattice degrees of freedom. Here, we demonstrate that the electronic structure, magnetic and transport properties of La0.9Ba0.1MnO3 thin films can be effectively controlled by epitaxial strain. Spectroscopic studies and first-principles calculations reveal that the orbital occupancy in Mn eg orbitals can be switched from the d3z2-r2 orbital to the dx2-y2 orbital by varying the strain from compressive to tensile. Further, the change of orbital occupancy associated with Mn 3d-O 2p hybridization leads to dramatic modulation of the magnetic and electronic properties of strained La0.9Ba0.1MnO3 thin films. Under moderate tensile strain, an emergent ferromagnetic insulating state with an enhanced ferromagnetic Curie temperature of 215 K is achieved. These findings not only deepen our understanding of electronic structures, magnetic and transport properties in the La0.9Ba0.1MnO3 system, but also demonstrate the use of epitaxial strain as an effective knob to tune the electronic structures and related physical properties for potential spintronic device applications.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); National Natural Science Foundation of China (NSFC); National Natural Science Foundation of Jiangsu Province; European Research Council (ERC); Engineering and Physical Sciences Research Council (EPSRC); Singapore National Science Foundation; National Science Foundation (NSF)
- Grant/Contract Number:
- 89233218CNA000001; 52102177; BK20210313; 21872116; 22075232; 758345; EP/L000202; EP/R029431; EP/T022213; EP/P020194; NRF-NRFF11-2019-0002; ECCS-1902623; 823717-ESTEEM3
- OSTI ID:
- 1900501
- Report Number(s):
- LA-UR-22-28512; TRN: US2311049
- Journal Information:
- Physical Review. B, Vol. 105, Issue 16; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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