Superconductivity in K3Ba3C60

Y. Iwasa; H. Hayashi; T. Furudate; T. Mitani

doi:10.1103/PhysRevB.54.14960

← Back to search

Superconductivity in K3Ba3C60

Y. Iwasa, H. Hayashi, T. Furudate, T. Mitani

DOI 10.1103/PhysRevB.54.14960 · Physical Review B

T1

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

We report superconductivity of ternary fulleride synthesized by intercalation of potassium into Ba3C60. Bulk superconductivity with the onset temperature at 5.6 K was observed in K3Ba3C60, which forms a body-centered-cubic (bcc) lattice with the cell parameter of a=11.24 Å. Naive electron counting predicts that the Fermi level of K3Ba3C60 is at the center of the t1g-derived band, in sharp contrast with also superconducting Ba6C60. This result indicates that the superconductivity of fullerides occurs at the half-filled states both of the t1u- and t1g-derived bands.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
K3Ba3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	5.6	Pressure not reported	onset
Ba6C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	7	Pressure not reported	onset
Rb3Ba3C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Ca5C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Sr6C60 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown