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Temperature dependence of metrological sensitivities of nitrogen-vacancy centers in diamond

ORAL

Abstract

Fluorescence count rate, spin state fluorescence contrast and spin coherence times are key parameters determining the metrological sensitivity of NV centres in diamond, as well as their applicability in quantum information processing applications [1-2]. These parameters are well studied at room and low temperatures (~ 4 K ). However, understanding how they vary between 100 - 4 K has important implications on utilising NVs to study material systems which display key phase transitions in this intermediate temperature regime [3]. We present a temperature dependent study of how these parameters vary in near surface ensembles and single NVs.

[1] L. Rondin et al. Magnetometry with nitrogen-vacancy defects in diamond Reports on progress in physics, 77(5):056503, (2014) 

[2] J. O’Gorman. et al. A silicon-based surface code quantum computer. npj Quantum Inf 2, 15019 (2016).

[3] Nathan J. McLaughlin et al ‘Strong Correlation Between Superconductivity and Ferromagnetism in an Fe-Chalcogenide Superconductor’ Nano Letters 21 (17), 7277-7283  (2021)

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Presenters

  • Felix Donaldson

    University College London

Authors

  • Felix Donaldson

    University College London

  • David Wise

    University College London

  • Siddharth Dhomkar

    University College London

  • Alec Jenkins

    University of Colorado Boulder

  • Ania C Jayich

    University of California, Santa Barbara, University of California Santa Barbara, Department of Physics, University of California Santa Barbara, Santa Barbara, California 93106, USA

  • John J. L. Morton

    University College London, Quantum Motion, UCL, London Centre for Nanotechnology, University College London