Nonadiabatic high-Tc superconductivity in hole-doped fullerenes
P. Paci, E. Cappelluti, C. Grimaldi, L. Pietronero, S. Strässler
DOI 10.1103/PhysRevB.69.024507 · Physical Review B
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Abstract
In this paper we address the possibility of high-Tc superconductivity (Tc∼100K) in hypothetical hole doped C60 within the context of the nonadiabatic theory of superconductivity. Our analysis shows that electron doped fullerenes, represented by the A3C60 family, are characterized by relatively small values of the electron–phonon coupling constant λ, which can thus be further increased by hole doping before lattice instabilities occur. In particular we show that Tc larger than 100 K are compatible in the nonadiabatic context with microscopic parameters λh≃0.5–1.0, μ*≃0.3–0.5 and phonon frequencies ωph≃1500–2000K. These results provide a stimulus for material engineering and optimization along the lines indicated.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Rb3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 30 | Pressure not reported | unknown |
| Nb3Sn Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 23 | Pressure not reported | unknown |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 40 | Pressure not reported | unknown |
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