DocumentCode :
80128
Title :
Graphene Micro-Substrate Induced High Electron-Phonon Coupling in 
Author :
Li, W.X. ; Xu, Xin ; De Silva, K.S.B. ; Xiang, F.X. ; Dou, S.X.
Author_Institution :
Inst. for Supercond. & Electron. Mater., Univ. of Wollongong, Wollongong, NSW, Australia
Volume :
23
Issue :
3
fYear :
2013
fDate :
Jun-13
Firstpage :
7000104
Lastpage :
7000104
Abstract :
Electron-phonon coupling strength was studied in graphene-MgB2 composites to explore the possibilities for a higher superconducting transition temperature (Tc). For the first time in the experimental work on MgB2, the Raman active E2g mode was split into two parts: a softened mode corresponding to tensile strain and a hardened mode attributed to the carbon substitution effect. The tensile strain effect is suggested to improve Tc of graphene-MgB2 composites because it increases the electron-phonon coupling strength of MgB2.
Keywords :
Raman spectra; boron alloys; composite superconductors; electron-phonon interactions; graphene; magnesium alloys; superconducting transition temperature; tensile strength; type II superconductors; C-MgB2; Raman active E2g mode; carbon substitution effect; graphene microsubstrate induced high electron-phonon coupling; graphene-MgB2 composites; hardened mode; softened mode; superconducting transition temperature; tensile strain effect; Carbon; Couplings; Lattices; Phonons; Superconducting transition temperature; Tensile strain; $hbox{MgB}_{2}$
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2012.2231139
Filename :
6365240
Link To Document :
