alpha-Ta Films on c-plane Sapphire with Enhanced Microstructure
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arXiv
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| Auteurs principaux: | , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866929432472584192 |
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| author | Majer, Lena N. Smink, Sander Braun, Wolfgang Fenk, Bernhard Harbola, Varun Stuhlhofer, Benjamin Wang, Hongguang van Aken, Peter A. Mannhart, Jochen Hensling, Felix V. E. |
| author_facet | Majer, Lena N. Smink, Sander Braun, Wolfgang Fenk, Bernhard Harbola, Varun Stuhlhofer, Benjamin Wang, Hongguang van Aken, Peter A. Mannhart, Jochen Hensling, Felix V. E. |
| contents | Superconducting films of alpha-Ta are promising candidates for the fabrication of advanced superconducting qubits. However, alpha-Ta films suffer from many growth-induced structural inadequacies that negatively affect their performance. We have therefore explored a new synthesis method for alpha-Ta films which allows the growth of these films with unprecedented quality. Using this method, high quality alpha-Ta films are deposited at a comparably high substrate temperature of 1150 C. They are single-phase alpha-Ta and have a single out-of-plane (110) orientation. They consist of grains above 2 um that have one of three possible in-plane orientations. As shown by scanning transmission electron microscopy and electron energy loss studies the substrate-film interfaces are sharp with no observable intermixing. The obtained insights into the epitaxial growth of body-centered-cubic films on quasi-hexagonal substrates lay the basis for harnessing the high structural coherence of such films in various applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_16227 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | alpha-Ta Films on c-plane Sapphire with Enhanced Microstructure Majer, Lena N. Smink, Sander Braun, Wolfgang Fenk, Bernhard Harbola, Varun Stuhlhofer, Benjamin Wang, Hongguang van Aken, Peter A. Mannhart, Jochen Hensling, Felix V. E. Superconductivity Materials Science Superconducting films of alpha-Ta are promising candidates for the fabrication of advanced superconducting qubits. However, alpha-Ta films suffer from many growth-induced structural inadequacies that negatively affect their performance. We have therefore explored a new synthesis method for alpha-Ta films which allows the growth of these films with unprecedented quality. Using this method, high quality alpha-Ta films are deposited at a comparably high substrate temperature of 1150 C. They are single-phase alpha-Ta and have a single out-of-plane (110) orientation. They consist of grains above 2 um that have one of three possible in-plane orientations. As shown by scanning transmission electron microscopy and electron energy loss studies the substrate-film interfaces are sharp with no observable intermixing. The obtained insights into the epitaxial growth of body-centered-cubic films on quasi-hexagonal substrates lay the basis for harnessing the high structural coherence of such films in various applications. |
| title | alpha-Ta Films on c-plane Sapphire with Enhanced Microstructure |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2407.16227 |