Strong coherent coupling of V[TCNE]x magnons to NV center spins

Denis R. Candido; Gregory D. Fuchs; Ezekiel Johnston-Halperin; Michael E. Flatté

doi:10.1117/12.2568106

21 August 2020 Strong coherent coupling of V[TCNE]x magnons to NV center spins

Denis R. Candido, Gregory D. Fuchs, Ezekiel Johnston-Halperin, Michael E. Flatté

Proceedings Volume 11470, Spintronics XIII; 1147022 (2020) https://doi.org/10.1117/12.2568106
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

Here, we predict a strong coherent coupling in the quantum regime between V[TCNE]x magnons [1,2] and spin coherent NV center levels. First, we calculate analytically the magnon dispersion and fringe field and obtain a NV spin-magnon coupling strength of 8.7 kHz for a disk of diameter 1 μm. Secondly, we derive an analytical expression for the cooperativity as a function of NV center position for a general magnetic disk on top of the diamond substrate. Using realistic coherence times of both NV centers and V[TCNE]x magnons, we predict cooperativity C ≈ 6 for NV centers placed within a wide spatial region. Thus our proposal provides an avenue for coupling between NV centers separated by ≈1 μm. The material is based on work supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Award Number DE-SC0019250. [1] Na Zhu, et. al., Applied Physics Letters 109, 082402 (2016). [2] A. Franson, et. al., APL Materials 7, 121113 (2019).

Conference Presentation

Citation Download Citation

Denis R. Candido, Gregory D. Fuchs, Ezekiel Johnston-Halperin, and Michael E. Flatté "Strong coherent coupling of V[TCNE]x magnons to NV center spins", Proc. SPIE 11470, Spintronics XIII, 1147022 (21 August 2020); https://doi.org/10.1117/12.2568106

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