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Nature Communications paper presents technique to optimize thin films for optoelectronic devices

Written By: Adam Malecek

Chang-Beom Eom, a professor of materials science and engineering at the University of Wisconsin-Madison, published a paper in the November 22, 2021 issue of the prestigious journal Nature Communications.

 Chang-Beom Eom
Chang-Beom Eom

The paper, titled “In-plane quasi-single-domain BaTiO3 via interfacial symmetry engineering,” discusses a new strategy for designing single-domain, in-plane polarized ferroelectric barium titanate thin films.

Thin films show promise as a basis for new, small, powerful optoelectronic devices. However, these materials often exhibit complicated multi-domain states, which can interfere with and degrade optoelectronic device performance.

In this paper, Eom and his colleagues worked with barium titanate, a piezoelectric material which produces electricity when strained, and vice versa. By manipulating the piezoelectric properties using straining and interfacial symmetry engineering, the team was able to produce a single-domain, in-plane polarized barium titanate thin film. This type of single-domain material may be used in optoelectronic devices without negatively affecting them.

Chang-Beom Eom is Raymond R. Holton Chair for Engineering and Theodore H. Geballe Professor at UW-Madison.

Other UW-Madison authors include Jungwoo Lee, Kitae Eom, Shane Lindemann, Sangwoo Ryu, Hyungwoo Lee and Tae Heon Kim.

Other authors include H. Lu, A. Gruverman and E. Y. Tsymbal from the University of Nebraska, Lincoln; T. R. Paudel of the University of Nebraska, Lincoln and South Dakota School of Mines and Technology; B. Wang, Y. Yuan, J. A. Zorn, S. Lei, V. Gopalan and L. Q. Chen of The Pennsylvania State University; H. X. Huyan, W. P. Gao & X. Q. Pan of the University of California, Irvine; and T. Tybell of the Norwegian University of Science and Technology.

The UW-Madison authors acknowledge support from the Gordon and Betty Moore Foundation’s EPiQS Initiative, Grant GBMF9065; Vannevar Bush Faculty Fellowship (N00014-20-1-2844), the Army Research Office through Grant W911NF-17-1-0462, AFOSR (FA9550-15-1-0334) and NSF through the University of Wisconsin MRSEC (DMR-1720415).