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In-plane quasi-single-domain BaTiO3 via interfacial symmetry engineering

Journal Article · · Nature Communications
 [1];  [2];  [3];  [4];  [5];  [6];  [2];  [2];  [2];  [2];  [4];  [4];  [4];  [6];  [7];  [4];  [6];  [5];  [4];  [5] more »;  [2] « less
  1. University of Wisconsin, Madison, WI (United States); OSTI
  2. University of Wisconsin, Madison, WI (United States)
  3. University of Nebraska, Lincoln, NE (United States); South Dakota School of Mines and Technology, Rapid City, SD (United States)
  4. Pennsylvania State University, University Park, PA (United States)
  5. University of Nebraska, Lincoln, NE (United States)
  6. University of California, Irvine, CA (United States)
  7. 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

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