Coherent coupling of V[TCNE]<sub>x</sub><sub>≈</sub><sub>2 </sub>magnons to NV center spins

ORAL

Abstract

The application of a rf magnetic field in magnetic materials yield the creation of magnons (spin waves) [1]. For the organic V[TCNE]x≈2 ferrimagnetic material [2], those magnons are found to have very long spin lifetime, thus enhancing the practical chances for applications. In our work, these excitations are coherent coupled – through the magnon fringe fields – to the spin of a Nitrogen-Vacancy (NV) center within a diamond substrate, placed below our magnetic structure. Interestingly, this coherent coupling has the potential to solve the problem of the communication between local qubits at low temperatures and optical photons, a necessary ingredient for networking and quantum communication. Here, we calculate the magnon spectrum, fringe fields and magnetizations profiles for V[TCNE]x≈2 disks. In addition, we also derive an effective Hamiltonian describing the coupling between NV center spins and magnons. We calculate the realistic effective Hamiltonian parameters, e.g., the spin-magnon coupling, for different physical setups.


[1] R. W. Damon et al., J. Phys. Chem. Solids 19, 308 (1961).
[2] Na Zhu et. al., Appl. Phys. Lett. 109, 082402 (2016)

*The material is based on work supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Award Number DE-SC0019250.

–

Presenters

  • Denis Candido

    • Univ of Iowa
    • University of Iowa
    • Department of Physics and Astronomy and Optical Science and Technology Center, University of Iowa
    • Physics and Astronomy, University of Iowa

Authors

  • Denis Candido

    • Univ of Iowa
    • University of Iowa
    • Department of Physics and Astronomy and Optical Science and Technology Center, University of Iowa
    • Physics and Astronomy, University of Iowa

  • Gregory Fuchs

    • Cornell University
    • School of Applied and Engineering Physics, Cornell University

  • Michael Flatté

    • Optical Science and Technology Center and Department of Physics, The University of Iowa
    • Department of Physics and Astronomy, University of Iowa
    • University of Iowa
    • Univ of Iowa
    • University of Iowa, University of Chicago, and Eindhoven University of Technology
    • Physics and Astronomy, University of Iowa
    • Department of Physics and Astronomy, The University of Iowa