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.
Original language | English |
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Pages (from-to) | 264-277 |
Number of pages | 14 |
Journal | Ferroelectrics |
Volume | 583 |
Issue number | 1 |
DOIs | |
State | Published - 2021 |
Keywords
- Functional
- strain relationship
- surface reaction
- thin films