eprintid: 1430532
rev_number: 32
eprint_status: archive
userid: 608
dir: disk0/01/43/05/32
datestamp: 2014-05-23 19:07:20
lastmod: 2021-11-07 23:56:26
status_changed: 2014-05-23 19:07:20
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: Yang, S-L
creators_name: Sobota, JA
creators_name: Howard, CA
creators_name: Pickard, CJ
creators_name: Hashimoto, M
creators_name: Lu, DH
creators_name: Mo, S-K
creators_name: Kirchmann, PS
creators_name: Shen, Z-X
title: Superconducting graphene sheets in CaC6 enabled by phonon-mediated interband interactions
ispublished: pub
divisions: UCL
divisions: B04
divisions: C06
divisions: F60
keywords: Physical sciences; Condensed matter;
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NATURE COMMUNICATIONS | DOI: 10.1038/ncomms4493 ARTICLE
NATURE

PMCID: PMC3973042
PubMed ID: 24651261
abstract: There is a great deal of fundamental and practical interest in the possibility of inducing superconductivity in a monolayer of graphene. But while bulk graphite can be made to superconduct when certain metal atoms are intercalated between its graphene sheets, the same has not been achieved in a single layer. Moreover, there is a considerable debate about the precise mechanism of superconductivity in intercalated graphite. Here we report angle-resolved photoelectron spectroscopy measurements of the superconducting graphite intercalation compound CaC6 that distinctly resolve both its intercalant-derived interlayer band and its graphene-derived π* band. Our results indicate the opening of a superconducting gap in the π* band and reveal a substantial contribution to the total electron–phonon-coupling strength from the π*-interlayer interband interaction. Combined with theoretical predictions, these results provide a complete account for the superconducting mechanism in graphite intercalation compounds and lend support to the idea of realizing superconducting graphene by creating an adatom superlattice.
date: 2014-03-20
official_url: http://dx.doi.org/10.1038/ncomms4493
vfaculties: VMPS
oa_status: green
full_text_type: pub
primo: open
primo_central: open_green
verified: verified_manual
elements_source: WoS-Lite
elements_id: 944612
doi: 10.1038/ncomms4493
lyricists_name: Howard, Christopher
lyricists_name: Pickard, Christopher
lyricists_id: CAHOW21
lyricists_id: CJPIC35
full_text_status: public
publication: NATURE COMMUNICATIONS
volume: 5
article_number: ARTN 3493
issn: 2041-1723
citation:        Yang, S-L;    Sobota, JA;    Howard, CA;    Pickard, CJ;    Hashimoto, M;    Lu, DH;    Mo, S-K;         ... Shen, Z-X; + view all <#>        Yang, S-L;  Sobota, JA;  Howard, CA;  Pickard, CJ;  Hashimoto, M;  Lu, DH;  Mo, S-K;  Kirchmann, PS;  Shen, Z-X;   - view fewer <#>    (2014)    Superconducting graphene sheets in CaC6 enabled by phonon-mediated interband interactions.                   NATURE COMMUNICATIONS , 5     , Article ARTN 3493.  10.1038/ncomms4493 <https://doi.org/10.1038/ncomms4493>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/1430532/1/ncomms4493.pdf