Anisotropic Raman scattering and lattice orientation identification of 2M-WS2
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arXiv
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| Format: | Preprint |
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2025
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| author | Gautam, Sabin Mardanya, Sougata McBride, Joseph Hossain, A K M Manjur Yang, Qian Wang, Wenyong Ackerman, John Leonard, Brian M. Chowdhury, Sugata Tian, Jifa |
| author_facet | Gautam, Sabin Mardanya, Sougata McBride, Joseph Hossain, A K M Manjur Yang, Qian Wang, Wenyong Ackerman, John Leonard, Brian M. Chowdhury, Sugata Tian, Jifa |
| contents | Anisotropic materials with low symmetries hold significant promise for next-generation electronic and quantum devices. 2M-WS2, a candidate for topological superconductivity, has garnered considerable interest. However, a comprehensive understanding of how its anisotropic features contribute to unconventional superconductivity, along with a simple, reliable method to identify its crystal orientation, remains elusive. Here, we combine theoretical and experimental approaches to investigate angle- and polarization-dependent anisotropic Raman modes of 2M-WS2. Through first-principles calculations, we predict and analyze phonon dispersion and lattice vibrations of all Raman modes in 2M-WS2. We establish a direct correlation between their anisotropic Raman spectra and high-resolution transmission electron microscopy images. Finally, we demonstrate that anisotropic Raman spectroscopy can accurately determine the crystal orientation and twist angle between two stacked 2M-WS2 layers. Our findings provide insights into the electron-phonon coupling and anisotropic properties of 2M-WS2, paving the way for the use of anisotropic materials in advanced electronic and quantum devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_00945 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Anisotropic Raman scattering and lattice orientation identification of 2M-WS2 Gautam, Sabin Mardanya, Sougata McBride, Joseph Hossain, A K M Manjur Yang, Qian Wang, Wenyong Ackerman, John Leonard, Brian M. Chowdhury, Sugata Tian, Jifa Mesoscale and Nanoscale Physics Materials Science Anisotropic materials with low symmetries hold significant promise for next-generation electronic and quantum devices. 2M-WS2, a candidate for topological superconductivity, has garnered considerable interest. However, a comprehensive understanding of how its anisotropic features contribute to unconventional superconductivity, along with a simple, reliable method to identify its crystal orientation, remains elusive. Here, we combine theoretical and experimental approaches to investigate angle- and polarization-dependent anisotropic Raman modes of 2M-WS2. Through first-principles calculations, we predict and analyze phonon dispersion and lattice vibrations of all Raman modes in 2M-WS2. We establish a direct correlation between their anisotropic Raman spectra and high-resolution transmission electron microscopy images. Finally, we demonstrate that anisotropic Raman spectroscopy can accurately determine the crystal orientation and twist angle between two stacked 2M-WS2 layers. Our findings provide insights into the electron-phonon coupling and anisotropic properties of 2M-WS2, paving the way for the use of anisotropic materials in advanced electronic and quantum devices. |
| title | Anisotropic Raman scattering and lattice orientation identification of 2M-WS2 |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2501.00945 |