Graphene micro-substrate induced high electron-phonon coupling in MgB <inf>2</inf>
- Publication Type:
- Journal Article
- IEEE Transactions on Applied Superconductivity, 2013, 23 (3)
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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. © 2002-2011 IEEE.
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