Isotopic disorder in superconducting fullerenes

Journal Article · Sun Aug 01 04:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.4114· OSTI ID:6324946

Deaven, D M; Rokhsar, D S ^[1]

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1. Department of Physics, University of California, Berkeley, California 94720 (United States)

The superconducting transition temperature of doped fullerenes appears to be unusually sensitive to [ital partial] substitution of [sup 13]C for the naturally abundant isotope [sup 12]C. We show that the electron-phonon coupling constant [lambda] is generically independent of isotopic disorder. By studying the effects of isotopic substitution on phonon-mediated superconductivity in C[sub 60] within the Migdal-Eliashberg theory we conclude that the theoretical superconducting transition temperature [ital T][sub [ital c]] does [ital not] show any anomalous dependence on isotopic substitution in weak or strong coupling. We comment on the possible causes of the experimentally observed effect.

• OSTI ID: 6324946
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:6; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665410* -- Superconductivity-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CARBON
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTS
FULLERENES
ISOTOPE EFFECTS
MATERIALS
MIGDAL THEORY
NONMETALS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE