Vacancy and Antisite-Induced Ferromagnetism in Liquid-Phase Exfoliated Bi$_2$Te$_3$
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866917868321374208 |
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| author | Gomez, Viviana Saenz, Maria Jose Canaval, Johanns Cuadrado, Liliana Espejo, Camilo Lopez, William Hernandez, Yenny |
| author_facet | Gomez, Viviana Saenz, Maria Jose Canaval, Johanns Cuadrado, Liliana Espejo, Camilo Lopez, William Hernandez, Yenny |
| contents | Bismuth Telluride (Bi$_2$Te$_3$) is a widely studied topological insulator, recognized for its unique surface states, low electronic bandgap, and low thermal conductivity. In this study, we characterize exfoliated Bi$_2$Te$_3$ dispersions produced via solvothermal intercalation, where ferromagnetism was measured at room temperature. DFT simulations show that this ferromagnetic behavior is attributed to the presence of vacancies and antisites in both the bulk material and the exfoliated crystals. Additionally, the DFT results were complemented by experimental measurements of the optical bandgap using UV-Vis spectroscopy, revealing a broadening of the bandgap as the material becomes thinner. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_10539 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Vacancy and Antisite-Induced Ferromagnetism in Liquid-Phase Exfoliated Bi$_2$Te$_3$ Gomez, Viviana Saenz, Maria Jose Canaval, Johanns Cuadrado, Liliana Espejo, Camilo Lopez, William Hernandez, Yenny Materials Science Bismuth Telluride (Bi$_2$Te$_3$) is a widely studied topological insulator, recognized for its unique surface states, low electronic bandgap, and low thermal conductivity. In this study, we characterize exfoliated Bi$_2$Te$_3$ dispersions produced via solvothermal intercalation, where ferromagnetism was measured at room temperature. DFT simulations show that this ferromagnetic behavior is attributed to the presence of vacancies and antisites in both the bulk material and the exfoliated crystals. Additionally, the DFT results were complemented by experimental measurements of the optical bandgap using UV-Vis spectroscopy, revealing a broadening of the bandgap as the material becomes thinner. |
| title | Vacancy and Antisite-Induced Ferromagnetism in Liquid-Phase Exfoliated Bi$_2$Te$_3$ |
| topic | Materials Science |
| url | https://arxiv.org/abs/2412.10539 |