Graphene micro-substrate induced high electron-phonon coupling in MgB2

Authors

W X. Li, University of WollongongFollow
X Xu, University of WollongongFollow
K S. B De Silva, University of WollongongFollow
F X. Xiang, University of WollongongFollow
S X. Dou, University of WollongongFollow

RIS ID

74925

Publication Details

Li, W. X., Xu, X., De Silva, K. S. B., Xiang, F. X. & Dou, S. X. (2013). Graphene micro-substrate induced high electron-phonon coupling in MgB2. IEEE Transactions on Applied Superconductivity, 23 (3), 1-4.

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.

Grant Number

ARC/DP0770205

Additional Grant Number

http://purl.org/au-research/grants/arc/DP0770205