Raman Spectroscopy of Two-Dimensional Borophene Sheets.
ACS Nano
; 13(4): 4133-4139, 2019 Apr 23.
Article
em En
| MEDLINE
| ID: mdl-30913391
ABSTRACT
The successful fabrication of a two-dimensional boron sheet, which features a triangular lattice with periodic hole arrays, has stimulated great interest in its specific structure as well as properties such as possible superconductivity. Here, we report a study on the vibrational spectra and electron-phonon coupling (EPC) in monolayer boron sheets by in situ Raman and tip-enhanced Raman spectroscopy (TERS) at low temperature and ultrahigh vacuum. The gap-mode TERS gives a 3 × 109 selective enhancement on vertical vibrational Raman modes. A spatial resolution of 1 nm is achieved in this system. Combined with first-principle calculations, the vibrational properties as well as EPC in borophene are determined. The results are helpful for further study on the mechanical, electronic, and possible superconducting properties of two-dimensional boron.
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Base de dados:
MEDLINE
Idioma:
En
Revista:
ACS Nano
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
China