Pairing in alkaline-earth-metal-doped fullerenes

Journal Article · Fri Dec 15 00:00:00 EST 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.52.16377· OSTI ID:147788

Deaven, D M ^[1]; Lammert, P E ^[2]; Rokhsar, D S ^[3]

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1. Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011 (United States)
2. Department of Physics, Simon Fraser University, Burnaby, British Columbia, V5A 1S6 (Canada)
3. Department of Physics, University of California, Berkeley, California 94720 (United States)

Among the alkaline-earth-metal-doped fullerenes are several superconductors: Ca{sub 5}C{sub 60} ({ital T}{sub {ital c}}=8.4 K), Ba{sub 6}C{sub 60} ({ital T}{sub {ital c}}=7 K), and Sr{sub 6}C{sub 60} ({ital T}{sub {ital c}}=4 K). While the relevant molecular orbitals of the alkali-metal-doped fullerenes has {ital t}{sub 1{ital u}} symmetry, superconductivity in the alkaline-earth-metal-doped fullerenes is derived from the {ital t}{sub 1{ital g}} level that lies immediately above the {ital t}{sub 1{ital u}} manifold. We calculate and compare the effective on-ball pairing interaction in these states due to phonon exchange and electron-electron repulsion.

• OSTI ID: 147788
• Journal Information: Physical Review, B: Condensed Matter, Vol. 52, Issue 23; Other Information: PBD: 15 Dec 1995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FULLERENES
SUPERCONDUCTIVITY
DOPED MATERIALS
ALKALINE EARTH METALS
CALCIUM ADDITIONS
BARIUM ADDITIONS
STRONTIUM ADDITIONS
PAIRING INTERACTIONS