Investigation of electron-phonon coupling in epitaxial silicene by in situ Raman spectroscopy

Authors

Jincheng Zhuang, University of WollongongFollow
Xun Xu, University of WollongongFollow
Yi Du, University of WollongongFollow
Kehui Wu, Chinese Academy of Sciences
Lan Chen, Chinese Academy of Sciences
Weichang Hao, Beijing University of Aeronautics and Astronautics, Beihang University, University of Wollongong
Jiaou Wang, Chinese Academy of Sciences
Wai K. Yeoh, University of SydneyFollow
Xiaolin Wang, University of WollongongFollow
S X. Dou, University of WollongongFollow

RIS ID

100617

Publication Details

Zhuang, J., Xu, X., Du, Y., Wu, K., Chen, L., Hao, W., Wang, J., Yeoh, W. Kong., Wang, X. & Dou, S. Xue. (2015). Investigation of electron-phonon coupling in epitaxial silicene by in situ Raman spectroscopy. Physical Review B: Condensed Matter and Materials Physics, 91 (16), 161409-1-161409-5.

Abstract

We report that the special coupling between Dirac fermion and lattice vibrations, in other words, electron-phonon coupling (EPC), in silicene layers on an Ag(111) surface was probed by in situ Raman spectroscopy. We find the EPC is significantly modulated due to tensile strain, which results from the lattice mismatch between silicene and the substrate, and the charge doping from the substrate. The special phonon modes corresponding to two-dimensional electron gas scattering at the edge sites in the silicene were identified. Detecting the relationship between EPC and Dirac fermions through Raman scattering will provide a direct route to investigate the exotic property in buckled two-dimensional honeycomb materials.

Grant Number

ARC/DP140102581, ARC/LE100100081, ARC/LE110100099

Additional Grant Number

http://purl.org/au-research/grants/arc/DP140102581

http://purl.org/au-research/grants/arc/LE100100081

http://purl.org/au-research/grants/arc/LE110100099