Functionalities enhancement by an anisotropic strain competition. Issue 1 (26th October 2021)

• Record Type: Journal Article
• Authors: Zhang, X. D.; Shi, Y.; Dho, Joonghoe; Kwon, Daeyoung; Kim, Bog G.; Park, Sungmin; Jung, Myung-Hwa; Kwon, Hyosang; Hwang, Jihwan; Park, Gwangseo; Xing, H. Z.; Lin, T.; Meng, X. J.; Huang, Z. M.; Zhu, X. T.; Bai, W.; Chu, J. H.
• Is Part Of: Ferroelectrics. Volume 583:Issue 1(2021)
• Page Start: 264
• Page End: 277
• Publication Date: 2021-10-26
• Subjects: Functional -- strain relationship -- surface reaction -- thin films; Ferroelectricity -- Periodicals; Ferroelectric crystals -- Periodicals; 537
• DOI: 10.1080/00150193.2021.1980342
• Languages: English
• ISSNs: 0015-0193

Abstract

Abstract: It is generally believed that epitaxial thin films are subject to compressive strain by the nearest layer with a smaller lattice constant or to tensile strain by the nearest layer with a larger lattice constant. Our experimental and theoretical results show that the above viewpoint is not always effective if the interface is anisotropic in the plane. We propose a novel strain mechanism that takes into account the pre-strain state as a key factor rather than considering only the lattice mismatch. Therefore, this anomalous strain model is potentially important for various multifunctional devices based on strain coupling.