Evidence of strong and mode-selective electron–phonon coupling in the topological superconductor candidate 2M-WS2

Yiwei Li (), Lixuan Xu, Gan Liu, Yuqiang Fang, Huijun Zheng, Shenghao Dai, Enting Li, Guang Zhu, Shihao Zhang, Shiheng Liang, Lexian Yang, Fuqiang Huang, Xiaoxiang Xi (), Zhongkai Liu (), Nan Xu () and Yulin Chen
Additional contact information
Yiwei Li: Wuhan University
Lixuan Xu: Hubei University
Gan Liu: Nanjing University
Yuqiang Fang: Shanghai Jiao Tong University
Huijun Zheng: ShanghaiTech University
Shenghao Dai: Wuhan University
Enting Li: Wuhan University
Guang Zhu: Wuhan University
Shihao Zhang: Hunan University
Shiheng Liang: Hubei University
Lexian Yang: Tsinghua University
Fuqiang Huang: Shanghai Jiao Tong University
Xiaoxiang Xi: Nanjing University
Zhongkai Liu: ShanghaiTech University
Nan Xu: Wuhan University
Yulin Chen: ShanghaiTech University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract 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.

Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-024-50590-9 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-50590-9

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-024-50590-9

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().