Structural and Electronic Properties of the Noncubic Superconducting Fullerides A4′C60 (A′=Ba,Sr)
Craig M. Brown, Susumu Taga, Balvinder Gogia, Konstantinos Kordatos, Serena Margadonna, Kosmas Prassides, Yoshihiro Iwasa, Katsumi Tanigaki, Andrew N. Fitch, Philip Pattison
DOI 10.1103/PhysRevLett.83.2258 · 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
The absence of superconductivity in noncubic alkali fullerides, A4C60 (A=K,Rb,Cs) has been associated with the effects of electron correlation and electron-phonon interaction on the narrow t1u-derived conduction band. We find that the structurally related alkaline earth fullerides, A4′C60 (A′=Sr,Ba), are superconducting with small values of the densities of states at the Fermi level, NεF. Close contacts between Ba2+ ions and neighboring C60 units in Ba4C60 imply a strong orbital hybridization, which is evidently responsible for stabilizing the noncubic superconducting phase, in contrast to insulating A4C60.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba4C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.7 | Pressure not reported | onset |
| Sr4C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 4.4 | Pressure not reported | onset |
| Ba6C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 6.5 | Pressure not reported | unknown |
Similar papers
Critical magnetic fields of superconducting Ba6C60
similarity 0.95V. Korenivski et al.
Source status unknown — claims are unverified
Electronic structure of K3Ba3C60 and Rb3Ba3C60 superconductors
similarity 0.94Koichiro Umemoto et al.
Source status unknown — claims are unverified
Superconducting and normal-state properties of nonavalent fullerides
similarity 0.94Y. Iwasa et al.
Source status unknown — claims are unverified
Electronic structure of the Ba4C60 superconductor
similarity 0.93Koichiro Umemoto & Susumu Saito
Source status unknown — claims are unverified
Superconductivity in LixCsC60 fullerides
similarity 0.93Mayumi Kosaka et al.
Source status unknown — claims are unverified
Pressure dependence of superconductivity in the Na2Rb0.5Cs0.5C60 fulleride
similarity 0.92Craig M. Brown et al.
Source status unknown — claims are unverified