Spin Resonance Clock Transition of the Endohedral Fullerene N15@C60

R. T. Harding, S. Zhou, J. Zhou, T. Lindvall, W. K. Myers, A. Ardavan, G. A. D. Briggs, K. Porfyrakis, and E. A. Laird
Phys. Rev. Lett. 119, 140801 – Published 4 October 2017
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Abstract

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.

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  • Received 12 May 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.140801

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

R. T. Harding1, S. Zhou1, J. Zhou1, T. Lindvall2, W. K. Myers3, A. Ardavan4, G. A. D. Briggs1, K. Porfyrakis1, and E. A. Laird1

  • 1Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom
  • 2VTT Technical Research Centre of Finland Ltd, Centre for Metrology MIKES, P.O. Box 1000, FI-02044 VTT, Finland
  • 3Centre for Advanced Electron Spin Resonance, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
  • 4Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom

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Issue

Vol. 119, Iss. 14 — 6 October 2017

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