| Abstract |
Anisotropic materials with low symmetries hold significant promise for next-generation electronic and quantum devices. 2M-WS2, which is 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 the 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. |
| Authors |
Sabin Gautam  , Sougata Mardanya  , Joseph McBride , Alamgir Hossain , Qian Yang , Wenyong Wang , John Ackerman , Brian M. Leonard , Sugata Chowdhury , Jifa Tian
|
| Journal Info |
American Chemical Society | Nano Letters
|
| Publication Date |
1/3/2025 |
| ISSN |
1530-6984 |
Type |
article |
| Open Access |
closed
|
| DOI |
https://doi.org/10.1021/acs.nanolett.4c04960 |
| Keywords |
Lattice (music) (Score: 0.47186062)
|
