Evidence of a structural anomaly at 14 K in polymerised CsC60

S. Rouziére, S. Margadonna, K. Prassides, A. N. Fitch

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Abstract

We report the results of a high-resolution synchrotron X-ray powder diffraction study of polymerised CsC60 in the temperature range 4 to 40 K. Its crystal structure is monoclinic (space group I2/m), isostructural with RbC60. Below 14 K, a spontaneous thermal contraction is observed along both the polymer chain axis, a and the interchain separation along [111], d1. This structural anomaly could trigger the occurrence of the spin-singlet ground state, observed by NMR at the same temperature.

Original languageEnglish
Pages (from-to)314-319
Number of pages6
JournalEurophysics Letters
Volume51
Issue number3
DOIs
Publication statusPublished - 2000 Aug 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Rouziére, S., Margadonna, S., Prassides, K., & Fitch, A. N. (2000). Evidence of a structural anomaly at 14 K in polymerised CsC60. Europhysics Letters, 51(3), 314-319. https://doi.org/10.1209/epl/i2000-00354-1