Pressure evolution of the structure of (NH3)K3C60

S. Margadonna; K. Prassides; H. Simoda; Y. Iwasa; M. Mézouar

doi:10.1209/epl/i2001-00481-1

Pressure evolution of the structure of (NH₃)K₃C₆₀

S. Margadonna, K. Prassides, H. Simoda, Y. Iwasa, M. Mézouar

Advanced Institute for Materials Research (AIMR)

Research output: Contribution to journal › Article

11 Citations (Scopus)

Abstract

The structural features of the ammoniated (NH₃)K₃C₆₀ fulleride are studied by synchrotron X-ray powder diffraction as a function of pressure to 6.7 GPa. A superstructure appears at ∼1 GPa as a result of orientational ordering of both the C₆₀ and K⁺_-NH₃ units (orthorhombic symmetry, space group Fddd). The pressure evolution of the lattice constants reveals a highly compressible, strongly anisotropic structure. The centre-to-centre interfullerene separations of ∼10.40 Å in the basal plane are comparable to those in the superconducting cubic analogue, RbCs₂C₆₀ and evidently sufficiently short to drive the system superconducting, despite its low crystal symmetry.

Original language	English
Pages (from-to)	61-66
Number of pages	6
Journal	Europhysics Letters
Volume	56
Issue number	1
DOIs	https://doi.org/10.1209/epl/i2001-00481-1
Publication status	Published - 2001 Oct 1

ASJC Scopus subject areas

Physics and Astronomy(all)

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Margadonna, S., Prassides, K., Simoda, H., Iwasa, Y., & Mézouar, M. (2001). Pressure evolution of the structure of (NH₃)K₃C₆₀. Europhysics Letters, 56(1), 61-66. https://doi.org/10.1209/epl/i2001-00481-1

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