Substrate-enhanced superconductivity in Li-decorated graphene
2013 (English)In: Europhysics letters, ISSN 0295-5075, E-ISSN 1286-4854, Vol. 104, no 4, 47013- p.Article in journal (Refereed) Published
We investigate the role of the substrate for the strength of the electron-phonon coupling in Li-decorated graphene. We find that the interaction with a h-BN substrate leads to a significant enhancement from lambda(0) = 0.62 to lambda(1) = 0.67, which corresponds to a 25% increase of the transition temperature from T-c0 = 10.33K to T-c1 = 12.98 K. The superconducting gaps amount to 1.56 meV (suspended) and 1.98 meV (supported). These findings open up a new route to enhanced superconducting transition temperatures in graphene-based materials by substrate engineering.
Place, publisher, year, edition, pages
2013. Vol. 104, no 4, 47013- p.
Hexagonal Boron-Nitride, Strong-Coupled Superconductors, Transition-Temperature, Electronic-Structure, Layer Graphene, Density, Dispersion, State
IdentifiersURN: urn:nbn:se:kth:diva-139987DOI: 10.1209/0295-5075/104/47013ISI: 000328882700027ScopusID: 2-s2.0-84890773786OAI: oai:DiVA.org:kth-139987DiVA: diva2:689143
FunderSwedish Research CouncilEU, European Research Council, ERC-DM-321031
QC 201401202014-01-202014-01-162014-01-23Bibliographically approved