Quantum sensing of lanthanide atoms on MgO/Ag(100)

ORAL

Abstract

In this work, we propose a single erbium (Er) atom on MgO surface as a potential atomic spin qubit. To characterize the magnetic moments of Er, we employ a hydrogenated titanium (Ti) atom as a quantum sensor. We build Ti-Er dimers with different separations and orientations and investigate their magnetic interactions using electron spin resonance in a scanning tunneling microscope (ESR-STM). From the ESR spectra measured from Ti in the dimers, we determine the magnetic interactions between Ti and Er and, thus, the magnetic moments of Er at different magnetic field directions. The magnetic interaction varies significantly depending on the magnetic field directions due to the large magnetic anisotropy of Er on MgO. We further discuss the potential structures for the coherent control and detection of erbium spins.

*This work was supported by the Institute for Basic Science (Grant No. IBS-R027-D1). K.N., C.W., and Y.B. acknowledge support from Asian Office of Aerospace Research and Development (Grant No. FA2386-20-1-4052).

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Presenters

  • Yujeong Bae

    • Institute for Basic Science

Authors

  • Yujeong Bae

    • Institute for Basic Science

  • Stefano Reale

    • Center for Quantum Nanoscience (QNS), Institute for Basic Science (IBS), Seoul 03760, Republic of Korea
    • IBS Center for Quantum Nanoscience

  • Jiyoon Hwang

    • Center for Quantum Nanoscience
    • IBS Center for Quantum Nanoscience

  • Taehong Ahn

    • Center for Quantum Nanoscience
    • IBS Center for Quantum Nanoscience

  • Jeongmin Oh

    • Center for Quantum Nanoscience
    • IBS Center for Quantum Nanoscience

  • Harald Brune

    • Ecole Polytechnique Federale de Lausanne

  • Andreas Heinrich

    • Center for Quantum Nanoscience
    • Center for Quantum Nanoscience (QNS), Ewha Womans University
    • IBS Center for Quantum Nanoscience
    • Center for Quantum Nanoscience (QNS). Institute for Basic Science (IBS).Department of Physics, Ewha Womans University

  • Fabio Donati

    • Center for Quantum Nanoscience (QNS), Ewha Womans University
    • Center for Quantum Nanoscience (QNS), Institute for Basic Science (IBS), Seoul 03760, Republic of Korea
    • IBS Center for Quantum Nanoscience
    • Center for Quantum Nanoscience (QNS). Institute for Basic Science (IBS). Department of Physics,Ewha Womans University