Carbon isotope effect in superconducting MgCNi3
T. Klimczuk, R. J. Cava
DOI 10.1103/PhysRevB.70.212514 · Physical Review B
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Abstract
The effect of carbon isotope substitution on TC in the intermetallic perovskite superconductor MgCNi3 is reported. Four independent groups of samples were synthesized and characterized. The average TC for the C12 samples was found to be 7.12±0.02K and the average TC for the C13 samples was found to be 6.82±0.02K. The resulting carbon isotope effect coefficient is αC=0.540±0.03. This indicates that carbon-based phonons play a critical role in the presence of superconductivity in this compound.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgCNi3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.12 | Pressure not reported | unknown |
| MgC12Ni3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7.12 | Pressure not reported | unknown |
| MgC13Ni3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.82 | Pressure not reported | unknown |
| Rb3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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