Influence of lithium doping on the thermodynamic properties of graphene based superconductors

D. Szczȩśniak, A. P. Durajski, R. Szczȩśniak

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24 Citations (Scopus)

Abstract

The superconducting phase in graphene can be induced by doping its surface with lithium atoms. In this paper, it is shown that the critical temperature (TC) for the LiC6 and Li2C6 compounds changes from 8.55 K to 21.83 K. The other thermodynamic parameters - the order parameter (Δ), the specific heat for the superconducting (CS) and the normal (CN) state and the thermodynamic critical field (HC) - differ from the predictions of the Bardeen-Cooper-Schrieffer theory. In particular, the ratio RΔ ≡ 2Δ(0)/kBTC is equal to and . Additionally, the quantities RC ≡ ΔC(TC)/CN(TC) and take the values , and , . Finally, it is shown that the electron effective mass at TC is high and equals: and .

Original languageEnglish
Article number255701
JournalJournal of Physics Condensed Matter
Volume26
Issue number25
DOIs
Publication statusPublished - 25 Jun 2014
Externally publishedYes

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Keywords

  • graphene
  • superconductivity
  • thermodynamic properties

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Science(all)

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