Intercalant-Driven Superconductivity in YbC$_{6}$ and CaC$_{6}$

I. I. Mazin

doi:10.1103/PhysRevLett.95.227001

paper

Intercalant-Driven Superconductivity in YbC $_{6}$ and CaC $_{6}$

arXiv:cond-mat/0504127 · doi:10.1103/PhysRevLett.95.227001

Abstract

Recently deiscovered superconductivity in YbC $_{6}$ and CaC $_{6}$ at temperatures substantially higher than previously known for intercalated graphites, raised several new questions: (1) Is the mechanism considerably different from the previously known intercalated graphites? (2) If superconductivity is conventional, what are the relevant phonons? (3) Given extreme similarity between YbC $_{6}$ and CaCa $_{6}$ , why their critical temperatures are so different? We address these questions on the basis of first-principles calculations and conclude that coupling with intercalant phonons is likely to be the main force for superconductivity in YbC $_{6}$ and CaC $_{6}$ , but not in alkaline-intercalated compounds, and explain the difference in $T_{c}$ by the ``isotope effect'' due to the difference in Yb and Ca atomic masses.

4 pages, embedded postscript figires

Intercalant-Driven Superconductivity in YbC $_{6}$ and CaC $_{6}$

Abstract

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Intercalant-Driven Superconductivity in YbC6​ and CaC6​

Abstract

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Cited by in corpus (44)

Intercalant-Driven Superconductivity in YbC $_{6}$ and CaC $_{6}$