Evidence for superconductivity in Li-decorated monolayer graphene

Ludbrook, B. M.; Levy, G.; Nigge, P.; Zonno, M.; Schneider, M.; Dvorak, D. J.; Veenstra, C. N.; Zhdanovich, S.; Wong, D.; Dosanjh, P.; Straßer, C.; Stöhr, A.; Forti, S.; Ast, C. R.; Starke, U.; Damascelli, A.

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Evidence for superconductivity in Li-decorated monolayer graphene

MPS-Authors

/persons/resource/persons279744

Ast, C. R.
Department Nanoscale Science (Klaus Kern), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons280552

Starke, U.
Scientific Facility Interface Analysis (Ulrich Starke), Max Planck Institute for Solid State Research, Max Planck Society;

/persons/resource/persons279870

Damascelli, A.
Department Solid State Spectroscopy (Bernhard Keimer), Max Planck Institute for Solid State Research, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Ludbrook, B. M., Levy, G., Nigge, P., Zonno, M., Schneider, M., Dvorak, D. J., et al. (2015). Evidence for superconductivity in Li-decorated monolayer graphene. Proceedings of the National Academy of Sciences of the United States of America, 112(38), 11795-11799.

Cite as: https://hdl.handle.net/21.11116/0000-000E-CD68-7

Abstract

Monolayer graphene exhibitsmany spectacular electronic properties, with superconductivity being arguably the most notable exception. It was theoretically proposed that superconductivity might be induced by enhancing the electron-phonon coupling through the decoration of graphene with an alkali adatom superlattice [Profeta G, Calandra M, Mauri F (2012) Nat Phys 8(2): 131-134]. Although experiments have shown an adatom-induced enhancement of the electron-phonon coupling, superconductivity has never been observed. Using angle-resolved photoemission spectroscopy (ARPES), we show that lithium deposited on graphene at low temperature strongly modifies the phonon density of states, leading to an enhancement of the electron-phonon coupling of up to lambda similar or equal to 0.58. On part of the graphene-derived pi*-band Fermi surface, we then observe the opening of a Delta similar or equal to 0.9-meV temperature-dependent pairing gap. This result suggests for the first time, to our knowledge, that Li-decorated monolayer graphene is indeed superconducting, with T-c similar or equal to 5.9 K.