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Superconductivity in metal‐coated graphene
Author(s) -
Calandra Matteo,
Profeta Gianni,
Mauri Francesco
Publication year - 2012
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201200142
Subject(s) - graphene , superconductivity , exfoliation joint , condensed matter physics , materials science , graphite , doping , density functional theory , monolayer , graphene nanoribbons , metal , proximity effect (electron beam lithography) , electron , graphene oxide paper , nanotechnology , layer (electronics) , physics , quantum mechanics , resist , composite material , metallurgy , electron beam lithography
In this work we explore, by first‐principles density functional theory (DFT) calculations, the possibility of inducing electron–phonon mediated superconductivity in a graphene sheet by doping its surface with alkaline metal adatoms. We demonstrate that, contrary to what could be naively believed, simple exfoliation to one layer of superconducting graphite intercalated compounds (GICs) does not necessarily lead to superconducting graphene, as it is the case in CaC 6 . On the contrary, it is meaningful to look for superconductivity in monolayers obtained by exfoliating non‐superconducting GICs. In particular, we demonstrate that Li coating and double‐coating of graphene leads to superconductivity in graphene with T c that could be as large as 18 K.