In-plane quasi-single-domain BaTiO3 via interfacial symmetry engineering
- University of Wisconsin, Madison, WI (United States); OSTI
- University of Wisconsin, Madison, WI (United States)
- University of Nebraska, Lincoln, NE (United States); South Dakota School of Mines and Technology, Rapid City, SD (United States)
- Pennsylvania State University, University Park, PA (United States)
- University of Nebraska, Lincoln, NE (United States)
- University of California, Irvine, CA (United States)
- Norwegian University of Science and Technology, Trondheim (Norway)
The control of the in-plane domain evolution in ferroelectric thin films is not only critical to understanding ferroelectric phenomena but also to enabling functional device fabrication. However, in-plane polarized ferroelectric thin films typically exhibit complicated multi-domain states, not desirable for optoelectronic device performance. Here we report a strategy combining interfacial symmetry engineering and anisotropic strain to design single-domain, in-plane polarized ferroelectric BaTiO3 thin films. Theoretical calculations predict the key role of the BaTiO3/PrScO3 (110)O substrate interfacial environment, where anisotropic strain, monoclinic distortions, and interfacial electrostatic potential stabilize a single-variant spontaneous polarization. A combination of scanning transmission electron microscopy, piezoresponse force microscopy, ferroelectric hysteresis loop measurements, and second harmonic generation measurements directly reveals the stabilization of the in-plane quasi-single-domain polarization state. This work offers design principles for engineering in-plane domains of ferroelectric oxide thin films, which is a prerequisite for high performance optoelectronic devices.
- Research Organization:
- Pennsylvania State University, University Park, PA (United States); University of California, Irvine, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); Gordon and Betty Moore Foundation; Vannevar Bush Faculty Fellowship; US Army Research Office (ARO); Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF)
- Grant/Contract Number:
- SC0012375; SC0014430; SC0020145
- OSTI ID:
- 1904472
- Journal Information:
- Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 12; ISSN 2041-1723
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English