Intercalant-Driven Superconductivity in YbC6 and CaC6
I. I. Mazin
DOI 10.1103/PhysRevLett.95.227001 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
Recently discovered superconductivity in and , at temperatures substantially higher than previously known for intercalated graphites, raises several new questions. (1) Is the mechanism considerably different from that of previously known intercalated graphites? (2) If superconductivity is conventional, what are the relevant phonons? (3) Given the extreme similarity between and , why are their critical temperatures 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 and , but not in alkaline-intercalated compounds, and explain the difference in by the “isotope effect” due to the difference in Yb and Ca atomic masses.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YbC6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.5 | Pressure not reported | unknown |
| CaC6 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11.5 | Pressure not reported | unknown |
| Y2C3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 18 | Pressure not reported | unknown |
Similar papers
Superconductivity in Heavy Alkaline-Earth Intercalated Graphites
similarity 0.96J. S. Kim et al.
Source status unknown — claims are unverified
Electronic Structure of Superconducting KC8 and Nonsuperconducting LiC6 Graphite Intercalation Compounds: Evidence for a Graphene-Sheet-Driven Superconducting State
similarity 0.94Z.-H. Pan et al.
Source status unknown — claims are unverified
Experimental Evidence of s-Wave Superconductivity in Bulk CaC6
similarity 0.94G. Lamura et al.
Source status unknown — claims are unverified
Superconductivity in the Graphite Intercalation Compound BaC6
similarity 0.94Satoshi Heguri et al.
Source status unknown — claims are unverified
Intercalant-Driven Superconductivity in YbC and CaC
similarity 0.93I. I. Mazin · 2005 · arXiv:cond-mat/0504127
Source status unknown — claims are unverified
Phonons and superconductivity in YbC and related compounds
similarity 0.93M. H. Upton et al. · 2010 · arXiv:1009.3056
Source status unknown — claims are unverified