Spin Resonance Clock Transition of the Endohedral Fullerene N 15 @ C60

R. T. Harding, S. Zhou, J. Zhou, T. Lindvall, W. K. Myers, A. Ardavan, G. A. D. Briggs, K. Porfyrakis, E. A. Laird

    Research output: Contribution to journalArticleScientificpeer-review

    5 Citations (Scopus)


    The endohedral fullerene N15@C60 has narrow electron paramagnetic resonance lines which have been proposed as the basis for a condensed-matter portable atomic clock. We measure the low-frequency spectrum of this molecule, identifying and characterizing a clock transition at which the frequency becomes insensitive to magnetic field. We infer a linewidth at the clock field of 100 kHz. Using experimental data, we are able to place a bound on the clock's projected frequency stability. We discuss ways to improve the frequency stability to be competitive with existing miniature clocks.

    Original languageEnglish
    Article number140801
    JournalPhysical Review Letters
    Issue number14
    Publication statusPublished - 4 Oct 2017
    MoE publication typeA1 Journal article-refereed


    • atomic clock
    • electron spin resonance
    • endohedral fullerene


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