Epitaxial growth and characterization of Bi$_{1-x}$Sb$_x$ thin films on (0001) sapphire substrates
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866917624519065600 |
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| author | Huang, Yu-Sheng Islam, Saurav Ou, Yongxi Ghosh, Supriya Richardella, Anthony Mkhoyan, K. Andre Samarth, Nitin |
| author_facet | Huang, Yu-Sheng Islam, Saurav Ou, Yongxi Ghosh, Supriya Richardella, Anthony Mkhoyan, K. Andre Samarth, Nitin |
| contents | We report the molecular beam epitaxy of Bi_1-xSb_x thin films ($0 \leq x \leq 1$) on (0001) sapphire substrates using a thin (Bi,Sb)$_2$Te$_3$ buffer layer. Characterization of the films using reflection high energy diffraction, x-ray diffraction, atomic force microscopy, and scanning transmission electron microscopy reveals epitaxial growth of films of reasonable structural quality. This is further confirmed via x-ray diffraction pole figures that determine the epitaxial registry between the thin film and substrate. We further investigate the microscopic structure of thin films via Raman spectroscopy, demonstrating how the vibrational modes vary as the composition changes and discussing the implications for the crystal structure. We also characterize the samples using electrical transport measurements. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_11899 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Epitaxial growth and characterization of Bi$_{1-x}$Sb$_x$ thin films on (0001) sapphire substrates Huang, Yu-Sheng Islam, Saurav Ou, Yongxi Ghosh, Supriya Richardella, Anthony Mkhoyan, K. Andre Samarth, Nitin Materials Science We report the molecular beam epitaxy of Bi_1-xSb_x thin films ($0 \leq x \leq 1$) on (0001) sapphire substrates using a thin (Bi,Sb)$_2$Te$_3$ buffer layer. Characterization of the films using reflection high energy diffraction, x-ray diffraction, atomic force microscopy, and scanning transmission electron microscopy reveals epitaxial growth of films of reasonable structural quality. This is further confirmed via x-ray diffraction pole figures that determine the epitaxial registry between the thin film and substrate. We further investigate the microscopic structure of thin films via Raman spectroscopy, demonstrating how the vibrational modes vary as the composition changes and discussing the implications for the crystal structure. We also characterize the samples using electrical transport measurements. |
| title | Epitaxial growth and characterization of Bi$_{1-x}$Sb$_x$ thin films on (0001) sapphire substrates |
| topic | Materials Science |
| url | https://arxiv.org/abs/2311.11899 |