Coupling of bias-induced crystallographic shear planes with charged domain walls in ferroelectric oxide thin films
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Stony Brook Univ., NY (United States). Dept. of Materials Science & Engineering
- McMaster Univ., Hamilton, ON (Canada). Dept. of Materials Science and Engineering
- Stony Brook Univ., NY (United States). Dept. of Physics and Astronomy
- Yale Univ., New Haven, CT (United States). Center for Research on Interface Structures and Phenomena, Dept. of Applied Physics; Yale Univ., New Haven, CT (United States). Dept. of Mechanical Engineering and Materials Science
- Rutgers Univ., Piscataway, NJ (United States). Rutgers Center for Emergent Materials, Dept. of Physics and Astronomy
Polar discontinuity at interfaces plays deterministic roles in charge transport, magnetism, and even superconductivity of functional oxides. To date, most polar discontinuity problems have been explored in hetero-interfaces between two dissimilar materials. Here, we show that charged domain walls (CDWs) in epitaxial thin films of ferroelectric PbZr0.2Ti0.8O3 are strongly coupled to polar interfaces through the formation of ½<101>{h0l} type crystallographic shear planes (CSPs). Using atomic resolution imaging and spectroscopy we illustrate that the CSPs consist of both conservative and nonconservative segments when coupled to the CDWs, where necessary compensating charges for stabilizing the CDWs are associated with vacancies at the CSPs. Lasly, the CDW/CSP coupling yields an atomically narrow domain walls, consisting of a single atomic layer of oxygen. This study shows that the CDW/CSP coupling is a fascinating venue to develop emergent material properties.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); Gordon and Betty Moore Foundation
- Grant/Contract Number:
- SC0012704; DMR119826; DMR1309868; DMR1334867; GBMF4413; DESC0012704
- OSTI ID:
- 1336196
- Alternate ID(s):
- OSTI ID: 1315857
- Report Number(s):
- BNL-113190-2016-JA; PRBMDO; R&D Project: MA015MACA; KC0201010
- Journal Information:
- Physical Review B, Vol. 94, Issue 10; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Physics and applications of charged domain walls
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journal | November 2018 |
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