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Temperature Dependent Structural Studies of K- and RB- Doped C60

  • Otto Zhou (a1), Qing Zhu (a1), Gavin B.M. Vaughan (a1), John E. Fischer (a1), Paul A. Heiney (a1), Nicole Coustel (a1), John Mccauley (a1), Amos B Smith (a1) and David E. Cox (a2)...

Abstract

The temperature dependent structural evolutions of RbxC60 (x = 3, 5, 6) and K4C60 were studied using both in-house andsynchrotron x-ray powder diffraction and thermal analysis techniques over a temperature range of 10K - 673K. The superconducting face centered-cubic (fcc) Rb3C60 and the body centered-tetragonal (bct) M4C60 (M = K, Rb) phases are found to be line compounds in this temperature range, while the body centered-cubic (bcc) phase forms a solid solution in which the solubility of vacant M sites increases with temperature. The orientation of the C60 molecules in the K4C60 phase was analyzed. A crystalline fcc Rb1C60 phase is stable only above room temperature.

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Temperature Dependent Structural Studies of K- and RB- Doped C60

  • Otto Zhou (a1), Qing Zhu (a1), Gavin B.M. Vaughan (a1), John E. Fischer (a1), Paul A. Heiney (a1), Nicole Coustel (a1), John Mccauley (a1), Amos B Smith (a1) and David E. Cox (a2)...

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