Evidence of strong and mode-selective electron–phonon coupling in the topological superconductor candidate 2M-WS 2
The interaction between lattice vibrations and electrons plays a key role in various aspects of condensed matter physics — including electron hydrodynamics, strange metal behavior, and high-temperature superconductivity. In this study, we present systematic investigations using Raman scattering and...
| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Nature Research
2024
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| _version_ | 1811140399206498304 |
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| author | Li, Y Xu, L Liu, G Fang, Y Zheng, H Dai, S Li, E Zhu, G Zhang, S Liang, S Yang, L Huang, F Xi, X Liu, Z Xu, N Chen, Y |
| author_facet | Li, Y Xu, L Liu, G Fang, Y Zheng, H Dai, S Li, E Zhu, G Zhang, S Liang, S Yang, L Huang, F Xi, X Liu, Z Xu, N Chen, Y |
| author_sort | Li, Y |
| collection | OXFORD |
| description | The interaction between lattice vibrations and electrons plays a key role in various aspects of condensed matter physics — including electron hydrodynamics, strange metal behavior, and high-temperature superconductivity. In this study, we present systematic investigations using Raman scattering and angle-resolved photoemission spectroscopy (ARPES) to examine the phononic and electronic subsystems of the topological superconductor candidate 2M-WS2. Raman scattering exhibits an anomalous nonmonotonic temperature dependence of phonon linewidths, indicative of strong phonon–electron scattering over phonon–phonon scattering. The ARPES results demonstrate pronounced dispersion anomalies (kinks) at multiple binding energies within both bulk and topological surface states, indicating a robust and mode-selective coupling between the electronic states and various phonon modes. These experimental findings align with previous calculations of the Eliashberg function, providing a deeper understanding of the highest superconducting transition temperature observed in 2M-WS2 (8.8 K) among all transition metal dichalcogenides as induced by electron–phonon coupling. Furthermore, our results may offer valuable insights into other properties of 2M-WS2 and guide the search for high-temperature topological superconductors. |
| first_indexed | 2024-09-25T04:21:22Z |
| format | Journal article |
| id | oxford-uuid:f7c2eed0-0ec8-4109-9a5d-7e7dc4c8148e |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-09-25T04:21:22Z |
| publishDate | 2024 |
| publisher | Nature Research |
| record_format | dspace |
| spelling | oxford-uuid:f7c2eed0-0ec8-4109-9a5d-7e7dc4c8148e2024-08-01T19:33:54ZEvidence of strong and mode-selective electron–phonon coupling in the topological superconductor candidate 2M-WS 2Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f7c2eed0-0ec8-4109-9a5d-7e7dc4c8148eEnglishJisc Publications RouterNature Research2024Li, YXu, LLiu, GFang, YZheng, HDai, SLi, EZhu, GZhang, SLiang, SYang, LHuang, FXi, XLiu, ZXu, NChen, YThe interaction between lattice vibrations and electrons plays a key role in various aspects of condensed matter physics — including electron hydrodynamics, strange metal behavior, and high-temperature superconductivity. In this study, we present systematic investigations using Raman scattering and angle-resolved photoemission spectroscopy (ARPES) to examine the phononic and electronic subsystems of the topological superconductor candidate 2M-WS2. Raman scattering exhibits an anomalous nonmonotonic temperature dependence of phonon linewidths, indicative of strong phonon–electron scattering over phonon–phonon scattering. The ARPES results demonstrate pronounced dispersion anomalies (kinks) at multiple binding energies within both bulk and topological surface states, indicating a robust and mode-selective coupling between the electronic states and various phonon modes. These experimental findings align with previous calculations of the Eliashberg function, providing a deeper understanding of the highest superconducting transition temperature observed in 2M-WS2 (8.8 K) among all transition metal dichalcogenides as induced by electron–phonon coupling. Furthermore, our results may offer valuable insights into other properties of 2M-WS2 and guide the search for high-temperature topological superconductors. |
| spellingShingle | Li, Y Xu, L Liu, G Fang, Y Zheng, H Dai, S Li, E Zhu, G Zhang, S Liang, S Yang, L Huang, F Xi, X Liu, Z Xu, N Chen, Y Evidence of strong and mode-selective electron–phonon coupling in the topological superconductor candidate 2M-WS 2 |
| title | Evidence of strong and mode-selective electron–phonon coupling in the topological superconductor candidate 2M-WS 2 |
| title_full | Evidence of strong and mode-selective electron–phonon coupling in the topological superconductor candidate 2M-WS 2 |
| title_fullStr | Evidence of strong and mode-selective electron–phonon coupling in the topological superconductor candidate 2M-WS 2 |
| title_full_unstemmed | Evidence of strong and mode-selective electron–phonon coupling in the topological superconductor candidate 2M-WS 2 |
| title_short | Evidence of strong and mode-selective electron–phonon coupling in the topological superconductor candidate 2M-WS 2 |
| title_sort | evidence of strong and mode selective electron phonon coupling in the topological superconductor candidate 2m ws 2 |
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