Strain-oxygen vacancies coupling in topotactic (La,Sr)CoO3-δ thin films
Oxygen defect engineering is a widely used approach for tuning physical properties in oxides. Multivalent transition metal oxide La0.7Sr0.3CoO3-δ (LSCO) shows oxygen vacancy-driven metal-to-insulator transition (MIT) due to topotactic phase transition and its high oxygen vacancy tolerance. Here, we...
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2024-12-01
|
| Series: | Applied Surface Science Advances |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666523924000722 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1846137687177691136 |
|---|---|
| author | Yichen Wu Victor Rosendal Milica Vasiljevic Imran Asghar Vincenzo Esposito |
| author_facet | Yichen Wu Victor Rosendal Milica Vasiljevic Imran Asghar Vincenzo Esposito |
| author_sort | Yichen Wu |
| collection | DOAJ |
| description | Oxygen defect engineering is a widely used approach for tuning physical properties in oxides. Multivalent transition metal oxide La0.7Sr0.3CoO3-δ (LSCO) shows oxygen vacancy-driven metal-to-insulator transition (MIT) due to topotactic phase transition and its high oxygen vacancy tolerance. Here, we introduce strain as a new degree of freedom to study the strain-oxygen vacancy coupling effects and elucidate its impact on the electronic property in oxygen-deficient LSCO epitaxial thin films grown on SrTiO3 (100) single crystal. By combining the experimental results with density functional theory plus U (DFT+U) calculations, we reveal that 2.1 % in-plane tensile strain can stabilize the insulating state of LSCO with a surprisingly low concentration of oxygen vacancies, <0.5 %. This study reveals that the MIT in LSCO is governed by the combination of oxygen vacancies and strain, offering the potential for additional tuning knob of the material's electronic properties. |
| format | Article |
| id | doaj-art-db7cb9aa2b0146a195027b1939449e1c |
| institution | Kabale University |
| issn | 2666-5239 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Applied Surface Science Advances |
| spelling | doaj-art-db7cb9aa2b0146a195027b1939449e1c2024-12-08T06:12:48ZengElsevierApplied Surface Science Advances2666-52392024-12-0124100644Strain-oxygen vacancies coupling in topotactic (La,Sr)CoO3-δ thin filmsYichen Wu0Victor Rosendal1Milica Vasiljevic2Imran Asghar3Vincenzo Esposito4Department of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs. Lyngby, DK-2800, DenmarkDepartment of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs. Lyngby, DK-2800, DenmarkDepartment of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs. Lyngby, DK-2800, DenmarkRenewable Energy Technologies Group, Faculty of Engineering and Natural Sciences, Tampere University, FI-33014, FinlandDepartment of Energy Conversion and Storage, Technical University of Denmark, 2800 Kgs. Lyngby, DK-2800, Denmark; Corresponding author.Oxygen defect engineering is a widely used approach for tuning physical properties in oxides. Multivalent transition metal oxide La0.7Sr0.3CoO3-δ (LSCO) shows oxygen vacancy-driven metal-to-insulator transition (MIT) due to topotactic phase transition and its high oxygen vacancy tolerance. Here, we introduce strain as a new degree of freedom to study the strain-oxygen vacancy coupling effects and elucidate its impact on the electronic property in oxygen-deficient LSCO epitaxial thin films grown on SrTiO3 (100) single crystal. By combining the experimental results with density functional theory plus U (DFT+U) calculations, we reveal that 2.1 % in-plane tensile strain can stabilize the insulating state of LSCO with a surprisingly low concentration of oxygen vacancies, <0.5 %. This study reveals that the MIT in LSCO is governed by the combination of oxygen vacancies and strain, offering the potential for additional tuning knob of the material's electronic properties.http://www.sciencedirect.com/science/article/pii/S2666523924000722Topotactic phase transitionTransition metal oxideMetal-to-insulator transitionStrainOxygen defectsDFT |
| spellingShingle | Yichen Wu Victor Rosendal Milica Vasiljevic Imran Asghar Vincenzo Esposito Strain-oxygen vacancies coupling in topotactic (La,Sr)CoO3-δ thin films Applied Surface Science Advances Topotactic phase transition Transition metal oxide Metal-to-insulator transition Strain Oxygen defects DFT |
| title | Strain-oxygen vacancies coupling in topotactic (La,Sr)CoO3-δ thin films |
| title_full | Strain-oxygen vacancies coupling in topotactic (La,Sr)CoO3-δ thin films |
| title_fullStr | Strain-oxygen vacancies coupling in topotactic (La,Sr)CoO3-δ thin films |
| title_full_unstemmed | Strain-oxygen vacancies coupling in topotactic (La,Sr)CoO3-δ thin films |
| title_short | Strain-oxygen vacancies coupling in topotactic (La,Sr)CoO3-δ thin films |
| title_sort | strain oxygen vacancies coupling in topotactic la sr coo3 δ thin films |
| topic | Topotactic phase transition Transition metal oxide Metal-to-insulator transition Strain Oxygen defects DFT |
| url | http://www.sciencedirect.com/science/article/pii/S2666523924000722 |
| work_keys_str_mv | AT yichenwu strainoxygenvacanciescouplingintopotacticlasrcoo3dthinfilms AT victorrosendal strainoxygenvacanciescouplingintopotacticlasrcoo3dthinfilms AT milicavasiljevic strainoxygenvacanciescouplingintopotacticlasrcoo3dthinfilms AT imranasghar strainoxygenvacanciescouplingintopotacticlasrcoo3dthinfilms AT vincenzoesposito strainoxygenvacanciescouplingintopotacticlasrcoo3dthinfilms |