Band anisotropy and effective mass renormalization in strained metallic VO2 (101) thin films
Abstract We explore how strain impacts the band structure of metallic-phase VO2 thin films deposited on TiO2(101) substrates. Employing a combination of X-ray absorption linear dichroism and valence band measurements, we demonstrate that strain can alter the intrinsic band structure anisotropy of me...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-11-01
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| Series: | NPG Asia Materials |
| Online Access: | https://doi.org/10.1038/s41427-024-00576-2 |
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| author | A. D’Elia V. Polewczyk A. Y. Petrov G. Vinai L. Li C. W. Zou S. J. Rezvani A. Marcelli |
| author_facet | A. D’Elia V. Polewczyk A. Y. Petrov G. Vinai L. Li C. W. Zou S. J. Rezvani A. Marcelli |
| author_sort | A. D’Elia |
| collection | DOAJ |
| description | Abstract We explore how strain impacts the band structure of metallic-phase VO2 thin films deposited on TiO2(101) substrates. Employing a combination of X-ray absorption linear dichroism and valence band measurements, we demonstrate that strain can alter the intrinsic band structure anisotropy of metallic VO2. Our findings reveal that reducing the thickness of VO2 films leads to a more isotropic band structure. This observation is further supported by an analysis of the electronic population redistribution in the $${d}_{{||}}{-}{\pi }^{* }$$ d || − π * bands, which affects the screening length and induces effective mass renormalization. Overall, our results underscore the potential of strain manipulation in tailoring the electronic structure uniformity of thin films, thereby expanding the scope for engineering VO2 functionalities. |
| format | Article |
| id | doaj-art-3b87872bc6c84ed5a20cd839f3be73fd |
| institution | Kabale University |
| issn | 1884-4057 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | NPG Asia Materials |
| spelling | doaj-art-3b87872bc6c84ed5a20cd839f3be73fd2025-01-19T12:28:35ZengNature PortfolioNPG Asia Materials1884-40572024-11-011611810.1038/s41427-024-00576-2Band anisotropy and effective mass renormalization in strained metallic VO2 (101) thin filmsA. D’Elia0V. Polewczyk1A. Y. Petrov2G. Vinai3L. Li4C. W. Zou5S. J. Rezvani6A. Marcelli7Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiCNR - Istituto Officina dei Materiali (IOM)CNR - Istituto Officina dei Materiali (IOM)CNR - Istituto Officina dei Materiali (IOM)National Synchrotron Radiation Laboratory, University of Science and Technology of ChinaNational Synchrotron Radiation Laboratory, University of Science and Technology of ChinaCNR - Istituto Officina dei Materiali (IOM)Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiAbstract We explore how strain impacts the band structure of metallic-phase VO2 thin films deposited on TiO2(101) substrates. Employing a combination of X-ray absorption linear dichroism and valence band measurements, we demonstrate that strain can alter the intrinsic band structure anisotropy of metallic VO2. Our findings reveal that reducing the thickness of VO2 films leads to a more isotropic band structure. This observation is further supported by an analysis of the electronic population redistribution in the $${d}_{{||}}{-}{\pi }^{* }$$ d || − π * bands, which affects the screening length and induces effective mass renormalization. Overall, our results underscore the potential of strain manipulation in tailoring the electronic structure uniformity of thin films, thereby expanding the scope for engineering VO2 functionalities.https://doi.org/10.1038/s41427-024-00576-2 |
| spellingShingle | A. D’Elia V. Polewczyk A. Y. Petrov G. Vinai L. Li C. W. Zou S. J. Rezvani A. Marcelli Band anisotropy and effective mass renormalization in strained metallic VO2 (101) thin films NPG Asia Materials |
| title | Band anisotropy and effective mass renormalization in strained metallic VO2 (101) thin films |
| title_full | Band anisotropy and effective mass renormalization in strained metallic VO2 (101) thin films |
| title_fullStr | Band anisotropy and effective mass renormalization in strained metallic VO2 (101) thin films |
| title_full_unstemmed | Band anisotropy and effective mass renormalization in strained metallic VO2 (101) thin films |
| title_short | Band anisotropy and effective mass renormalization in strained metallic VO2 (101) thin films |
| title_sort | band anisotropy and effective mass renormalization in strained metallic vo2 101 thin films |
| url | https://doi.org/10.1038/s41427-024-00576-2 |
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