Volume 104, Number 4, November 2013
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||17 December 2013|
Substrate-enhanced superconductivity in Li-decorated graphene
1 PSE Division, KAUST - Thuwal 23955-6900, Kingdom of Saudi Arabia
2 Theoretical Division, Los Alamos National Laboratory - Los Alamos, NM 87545, USA
3 Center for Nanotechnologies, Los Alamos National Laboratory - Los Alamos, NM 87545, USA
4 Nordita, KTH Royal Institute of Technology and Stockholm University - Roslagstullsbacken 23, SE-106 91, Stockholm, Sweden
Received: 11 October 2013
Accepted: 27 November 2013
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 to , which corresponds to a 25% increase of the transition temperature from to . 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.
PACS: 74.78.-w – Superconducting films and low-dimensional structures / 74.25.Kc – Phonons / 71.20.-b – Electron density of states and band structure of crystalline solids
© EPLA, 2013
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