First-principles computational studies of alkali-doped C60 fullerides. Final technical report, 1 Jan 91-1 Jan 92

Technical Report · Mon Apr 06 00:00:00 EDT 1992

OSTI ID:5188853

Erwin, S C

Researchers at AT and T Bell Laboratories reported the discovery of superconductivity at 18 K in a potassium-doped fullerene solid, KxC60. This marked a major turning point in the young history of the C60 molecule 'buckminsterfullerene': from a hypothetical molecular (1985), to small-scale (mg) production of crystalline powders (1988), to large-scale synthesis (1990), to a material with the highest transition temperature of any molecular superconductor. This history represents only one of many research lines. Concurrently with the work at AT and T on partial doping, researchers at the Laboratory for Research on the Structure of Matter at the University of Pennsylvania were doping solid C60 to saturation with potassium. The resulting pure phase, K6C60, was characterized by x-ray diffraction in April 1991: the lattice was body-centered cubic, with the C60 molecules essentially undistorted, orientationally ordered, and each surrounded by a cage of 24 K atoms. Nothing was known about the electronic structure at this early stage.

• Research Organization: Pennsylvania Univ., Philadelphia, PA (United States). Dept. of Physics
• OSTI ID: 5188853
• Report Number(s): AD-A-249018/3/XAB; CNN: N00014-91-J-1265
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FULLERENES
CRYSTAL STRUCTURE
POTASSIUM COMPOUNDS
ALKALI METALS
BCC LATTICES
CARBON
DIAMONDS
DOPED MATERIALS
ELECTRONS
INTERFACES
IONS
RESEARCH PROGRAMS
SUPERCONDUCTIVITY
X-RAY DIFFRACTION
ALKALI METAL COMPOUNDS
CHARGED PARTICLES
COHERENT SCATTERING
CRYSTAL LATTICES
CUBIC LATTICES
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELEMENTAL MINERALS
ELEMENTARY PARTICLES
ELEMENTS
FERMIONS
LEPTONS
MATERIALS
METALS
MINERALS
NONMETALS
PHYSICAL PROPERTIES
SCATTERING
360602* - Other Materials- Structure & Phase Studies