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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)

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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