Electron-phonon interactions and tensor analysis in topological insulator bismuth telluride using angle resolved polarized Raman spectroscopy
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866929724096249856 |
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| author | Singh, Aditya Elsukova, Anna Rawat, Divya Talukdar, Saswata Saha, Surajit Febvrier, Arnaud le Persson, Per O. Å. Eklund, Per Soni, Ajay |
| author_facet | Singh, Aditya Elsukova, Anna Rawat, Divya Talukdar, Saswata Saha, Surajit Febvrier, Arnaud le Persson, Per O. Å. Eklund, Per Soni, Ajay |
| contents | We report on the angle-resolved polarized Raman spectroscopy and estimation of the Raman tensor elements using both classical and quantum treatments to analyse the polarized Raman spectra of single crystal Bismuth Telluride. The observed polar patterns and systematic variations in the relative intensities of four characteristic Raman active modes indicate a higher differential polarizability along the c-axis, accompanied by anisotropic photon-phonon interactions. This interplay of electron-photon-phonon interactions is crucial for understanding the lattice dynamics of Bismuth Telluride, which underpin its thermoelectric performance and topological properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_15314 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Electron-phonon interactions and tensor analysis in topological insulator bismuth telluride using angle resolved polarized Raman spectroscopy Singh, Aditya Elsukova, Anna Rawat, Divya Talukdar, Saswata Saha, Surajit Febvrier, Arnaud le Persson, Per O. Å. Eklund, Per Soni, Ajay Materials Science We report on the angle-resolved polarized Raman spectroscopy and estimation of the Raman tensor elements using both classical and quantum treatments to analyse the polarized Raman spectra of single crystal Bismuth Telluride. The observed polar patterns and systematic variations in the relative intensities of four characteristic Raman active modes indicate a higher differential polarizability along the c-axis, accompanied by anisotropic photon-phonon interactions. This interplay of electron-photon-phonon interactions is crucial for understanding the lattice dynamics of Bismuth Telluride, which underpin its thermoelectric performance and topological properties. |
| title | Electron-phonon interactions and tensor analysis in topological insulator bismuth telluride using angle resolved polarized Raman spectroscopy |
| topic | Materials Science |
| url | https://arxiv.org/abs/2502.15314 |