The Dynamics of Oxygen Ion Exchange in Epitaxial Strontium Cobaltite Bilayers
Abstract The exchange of ions across interfaces is key to the field of iontronics, where the properties of the device can be altered by the local ion concentration. This study investigates a complex oxide system where structural and electronic phase transitions can be driven by changes in the concen...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley-VCH
2023-07-01
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| Series: | Advanced Materials Interfaces |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/admi.202300127 |
| _version_ | 1827892162711257088 |
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| author | Jill K. Wenderott Eric M. Dufresne Yan Li Hui Cao Qingteng Zhang K. V. L. V. Narayanachari D. Bruce Buchholz Supratik Guha Dillon D. Fong |
| author_facet | Jill K. Wenderott Eric M. Dufresne Yan Li Hui Cao Qingteng Zhang K. V. L. V. Narayanachari D. Bruce Buchholz Supratik Guha Dillon D. Fong |
| author_sort | Jill K. Wenderott |
| collection | DOAJ |
| description | Abstract The exchange of ions across interfaces is key to the field of iontronics, where the properties of the device can be altered by the local ion concentration. This study investigates a complex oxide system where structural and electronic phase transitions can be driven by changes in the concentration of oxygen ions. In situ coherent X‐ray studies are conducted on epitaxial bilayers of insulating SrCoO2.5 and metallic SrCoO3 − δ. The diffusion of oxygen ions across the bilayer is studied with X‐ray photon correlation spectroscopy to capture the dynamical behavior of the interface in reducing and oxidizing environments. The behavior is strongly asymmetric, with much slower dynamics appearing in reducing versus oxidizing environments. According to the correlation functions determined from different points in reciprocal space, this study finds that the dynamics near the center of the SrCoO2.5 crystal are generally similar to those near the heterointerfaces. The results suggest that the interface is stable and reversible, making SrCoOx a model system for the study of iontronic behavior. |
| first_indexed | 2024-03-12T21:36:54Z |
| format | Article |
| id | doaj.art-d1215ad3ea034a51a94f4ba5772e5917 |
| institution | Directory Open Access Journal |
| issn | 2196-7350 |
| language | English |
| last_indexed | 2024-03-12T21:36:54Z |
| publishDate | 2023-07-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Advanced Materials Interfaces |
| spelling | doaj.art-d1215ad3ea034a51a94f4ba5772e59172023-07-27T06:27:26ZengWiley-VCHAdvanced Materials Interfaces2196-73502023-07-011021n/an/a10.1002/admi.202300127The Dynamics of Oxygen Ion Exchange in Epitaxial Strontium Cobaltite BilayersJill K. Wenderott0Eric M. Dufresne1Yan Li2Hui Cao3Qingteng Zhang4K. V. L. V. Narayanachari5D. Bruce Buchholz6Supratik Guha7Dillon D. Fong8Materials Science Division Physical Sciences and Engineering Argonne National Laboratory Lemont IL 60439 USAX‐ray Science Division Advanced Photon Source Argonne National Laboratory Lemont IL 60439 USAMaterials Science Division Physical Sciences and Engineering Argonne National Laboratory Lemont IL 60439 USAMaterials Science Division Physical Sciences and Engineering Argonne National Laboratory Lemont IL 60439 USAX‐ray Science Division Advanced Photon Source Argonne National Laboratory Lemont IL 60439 USAMaterials Science and Engineering Northwestern University Evanston IL 60201 USAMaterials Science and Engineering Northwestern University Evanston IL 60201 USAMaterials Science Division Physical Sciences and Engineering Argonne National Laboratory Lemont IL 60439 USAMaterials Science Division Physical Sciences and Engineering Argonne National Laboratory Lemont IL 60439 USAAbstract The exchange of ions across interfaces is key to the field of iontronics, where the properties of the device can be altered by the local ion concentration. This study investigates a complex oxide system where structural and electronic phase transitions can be driven by changes in the concentration of oxygen ions. In situ coherent X‐ray studies are conducted on epitaxial bilayers of insulating SrCoO2.5 and metallic SrCoO3 − δ. The diffusion of oxygen ions across the bilayer is studied with X‐ray photon correlation spectroscopy to capture the dynamical behavior of the interface in reducing and oxidizing environments. The behavior is strongly asymmetric, with much slower dynamics appearing in reducing versus oxidizing environments. According to the correlation functions determined from different points in reciprocal space, this study finds that the dynamics near the center of the SrCoO2.5 crystal are generally similar to those near the heterointerfaces. The results suggest that the interface is stable and reversible, making SrCoOx a model system for the study of iontronic behavior.https://doi.org/10.1002/admi.202300127bilayersoxide heterostructurestrontium cobaltiteX-ray photon correlation spectroscopy |
| spellingShingle | Jill K. Wenderott Eric M. Dufresne Yan Li Hui Cao Qingteng Zhang K. V. L. V. Narayanachari D. Bruce Buchholz Supratik Guha Dillon D. Fong The Dynamics of Oxygen Ion Exchange in Epitaxial Strontium Cobaltite Bilayers Advanced Materials Interfaces bilayers oxide heterostructure strontium cobaltite X-ray photon correlation spectroscopy |
| title | The Dynamics of Oxygen Ion Exchange in Epitaxial Strontium Cobaltite Bilayers |
| title_full | The Dynamics of Oxygen Ion Exchange in Epitaxial Strontium Cobaltite Bilayers |
| title_fullStr | The Dynamics of Oxygen Ion Exchange in Epitaxial Strontium Cobaltite Bilayers |
| title_full_unstemmed | The Dynamics of Oxygen Ion Exchange in Epitaxial Strontium Cobaltite Bilayers |
| title_short | The Dynamics of Oxygen Ion Exchange in Epitaxial Strontium Cobaltite Bilayers |
| title_sort | dynamics of oxygen ion exchange in epitaxial strontium cobaltite bilayers |
| topic | bilayers oxide heterostructure strontium cobaltite X-ray photon correlation spectroscopy |
| url | https://doi.org/10.1002/admi.202300127 |
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