Strain Programming of Oxygen Octahedral Symmetry in Perovskite Oxide Thin Films
Abstract The collective rotations of oxygen octahedra play an important role in determining the physical properties of functional perovskite oxides. The epitaxial strain can serve as an effective means to modify the oxygen octahedral symmetry (OOS), i.e., oxygen octahedral rotation or tilt (OOR/OOT)...
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Wiley-VCH
2025-02-01
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| Series: | Advanced Materials Interfaces |
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| Online Access: | https://doi.org/10.1002/admi.202400697 |
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| author | Yunkyu Park Seoung‐Hun Kang Jeongkeun Song Sang Woon Hwang Shan Lin Jong Mok Ok Fazhi Yang Hwangsun Kim Andrew R. Lupini Mina Yoon Sangmoon Yoon Hua Zhou Ho Nyung Lee |
| author_facet | Yunkyu Park Seoung‐Hun Kang Jeongkeun Song Sang Woon Hwang Shan Lin Jong Mok Ok Fazhi Yang Hwangsun Kim Andrew R. Lupini Mina Yoon Sangmoon Yoon Hua Zhou Ho Nyung Lee |
| author_sort | Yunkyu Park |
| collection | DOAJ |
| description | Abstract The collective rotations of oxygen octahedra play an important role in determining the physical properties of functional perovskite oxides. The epitaxial strain can serve as an effective means to modify the oxygen octahedral symmetry (OOS), i.e., oxygen octahedral rotation or tilt (OOR/OOT). However, the strain‐OOS coupling that may alter the details of the OOS, thereby the physical properties, has not been fully understood. In this work, it is demonstrated that epitaxial strain can not only induce a structural phase transition but also precisely tune the degree of OOR. The correlated metal CaNbO3, which is orthorhombic, is studied by growing as epitaxial thin films. By imposing epitaxial strain, it is found that the film undergoes a structural phase transition from orthorhombic to tetragonal upon fully straining (i.e., from a+b−b− to a0a0c−). In unstrained films, the octahedral rotation along the c‐axis is as large as 15.7° that can be tuned to 6.6° by strain. This finding offers a general approach to manipulating OOR/OOT via strain engineering in complex oxide heterostructures. |
| format | Article |
| id | doaj-art-537cfc6e05ee49ddad8ae00da5d52463 |
| institution | Kabale University |
| issn | 2196-7350 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj-art-537cfc6e05ee49ddad8ae00da5d524632025-02-03T13:24:05ZengWiley-VCHAdvanced Materials Interfaces2196-73502025-02-01123n/an/a10.1002/admi.202400697Strain Programming of Oxygen Octahedral Symmetry in Perovskite Oxide Thin FilmsYunkyu Park0Seoung‐Hun Kang1Jeongkeun Song2Sang Woon Hwang3Shan Lin4Jong Mok Ok5Fazhi Yang6Hwangsun Kim7Andrew R. Lupini8Mina Yoon9Sangmoon Yoon10Hua Zhou11Ho Nyung Lee12Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USAMaterials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USAMaterials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USADepartment of Physics Gacheon University Seongnam 13120 Republic of KoreaMaterials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USADepartment of Physics Pusan National University Busan 46241 Republic of KoreaMaterials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USACenter for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37831 USACenter for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge TN 37831 USAMaterials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USADepartment of Physics Gacheon University Seongnam 13120 Republic of KoreaX‐ray Science Division Advanced Photon Source Argonne National Laboratory Lemont IL 60439 USAMaterials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USAAbstract The collective rotations of oxygen octahedra play an important role in determining the physical properties of functional perovskite oxides. The epitaxial strain can serve as an effective means to modify the oxygen octahedral symmetry (OOS), i.e., oxygen octahedral rotation or tilt (OOR/OOT). However, the strain‐OOS coupling that may alter the details of the OOS, thereby the physical properties, has not been fully understood. In this work, it is demonstrated that epitaxial strain can not only induce a structural phase transition but also precisely tune the degree of OOR. The correlated metal CaNbO3, which is orthorhombic, is studied by growing as epitaxial thin films. By imposing epitaxial strain, it is found that the film undergoes a structural phase transition from orthorhombic to tetragonal upon fully straining (i.e., from a+b−b− to a0a0c−). In unstrained films, the octahedral rotation along the c‐axis is as large as 15.7° that can be tuned to 6.6° by strain. This finding offers a general approach to manipulating OOR/OOT via strain engineering in complex oxide heterostructures.https://doi.org/10.1002/admi.202400697complex oxidesepitaxyoxygen octahedral symmetryperovskitesstrain engineering |
| spellingShingle | Yunkyu Park Seoung‐Hun Kang Jeongkeun Song Sang Woon Hwang Shan Lin Jong Mok Ok Fazhi Yang Hwangsun Kim Andrew R. Lupini Mina Yoon Sangmoon Yoon Hua Zhou Ho Nyung Lee Strain Programming of Oxygen Octahedral Symmetry in Perovskite Oxide Thin Films Advanced Materials Interfaces complex oxides epitaxy oxygen octahedral symmetry perovskites strain engineering |
| title | Strain Programming of Oxygen Octahedral Symmetry in Perovskite Oxide Thin Films |
| title_full | Strain Programming of Oxygen Octahedral Symmetry in Perovskite Oxide Thin Films |
| title_fullStr | Strain Programming of Oxygen Octahedral Symmetry in Perovskite Oxide Thin Films |
| title_full_unstemmed | Strain Programming of Oxygen Octahedral Symmetry in Perovskite Oxide Thin Films |
| title_short | Strain Programming of Oxygen Octahedral Symmetry in Perovskite Oxide Thin Films |
| title_sort | strain programming of oxygen octahedral symmetry in perovskite oxide thin films |
| topic | complex oxides epitaxy oxygen octahedral symmetry perovskites strain engineering |
| url | https://doi.org/10.1002/admi.202400697 |
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