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High-pressure Raman study of the alkaline-earth metal fulleride, Ca2.75C60

    https://doi.org/10.1142/S0217984920400564Cited by:3 (Source: Crossref)
    This article is part of the issue:

    The structural stability and electronic properties of Ca2.75C60 are probed by means of high-pressure Raman spectroscopy using two different pressure transmitting media that lead to practically identical results. Although Ca2.75C60 is isostructural with the rare-earth metal fulleride, Sm2.75C60 of the same stoichiometry, the pressure coefficients of characteristic intramolecular C60 modes are larger than those in the Sm2.75C60 counterpart but similar to those in the pristine C60 solid. Since the reduced pressure coefficients in the Sm fulleride have been attributed to strong Sm-C60 coupling, our findings for the isostructural Ca fulleride are compatible with a reduced orbital mixing and Ca-C60 coupling.

    PACS: 78.30.Na, 62.50.-p, 61.48.-c, 71.27.+a

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