Loading [MathJax]/jax/output/HTML-CSS/jax.js
Publication
Title
Hydrogen-induced rehybridization in epitaxial silicene
Author
Solonenko, Dmytro
Dzhagan, Volodymyr
Cahangirov, Seymur
Bacaksiz, Cihan
Sahin, Hasan
Zahn, Dietrich R. T.
Vogt, Patrick
Abstract
We report on the hydrogenation of (3 x 3)/(4 x 4) silicene epitaxially grown on Ag(111) studied by in situ Raman spectroscopy and state-of-the-art ab initio calculations. Our results demonstrate that hydrogenation of (3 x 3)/(4 x 4) silicene leads to the formation of two different atomic structures which exhibit distinct spectral vibrational modes. Raman selection rules clearly show that the Si atoms undergo a rehybridization in both cases from a mixed sp(2)-sp(3) to a dominating sp(3) state increasing the distance between the two silicene sublattices. This results in a softening of the in-plane and a stiffening of the out-of-plane phonon modes. Nevertheless, hydrogenated epitaxial silicene retains a two-dimensional nature and hence can be considered as epitaxial silicane. The level of hydrogenation can be determined by the intensity ratio of the Raman modes with different symmetries.
Language
English
Source (journal)
Physical review B / American Physical Society. - New York, N.Y, 2016, currens
Publication
New York, N.Y
:
American Physical Society
,
2017
ISSN
2469-9969 [online]
2469-9950 [print]
DOI
10.1103/PHYSREVB.96.235423
Volume/pages
96 :23 (2017) , 6 p.
Article Reference
235423
ISI
000417921100004
Medium
E-only publicatie
Full text (Publisher's DOI)
https://doi.org/10.1103/PHYSREVB.96.235423
UAntwerpen
Faculty/Department
Faculty of Sciences. Physics
Research group
Publication type
A1 Journal article
Subject
Physics
External links
Web of Science
View record in Web of Science®
View citing articles in Web of Science®
View Related Records® in Web of Science®
Record
Identifier
c:irua:154609
Creation
05.11.2018
Last edited
26.11.2024
To cite this reference
https://hdl.handle.net/10067/1546090151162165141
»
»