Probing thermal magnon current mediated by coherent magnon via nitrogen-vacancy centers in diamond

Abstract

Currently, thermally excited magnons are being intensively investigated owing to their potential in computing devices and thermoelectric conversion technologies. We report the detection of thermal magnon current propagating in a magnetic insulator yttrium iron garnet under a temperature gradient using a quantum sensor: electron spins associated with nitrogen-vacancy (NV) centers in diamond. Thermal magnon current was observed as modified Rabi oscillation frequencies of NV spins hosted in a beam-shaped bulk diamond that resonantly coupled with coherent magnon propagating over a long distance. Additionally, using a nanodiamond, alteration in NV spin relaxation rates depending on the applied temperature gradient were observed under a non-resonant NV excitation condition. The demonstration of probing thermal magnon current mediated by coherent magnon via NV spin states serves as a basis for creating a device platform hybridizing spin caloritronics and spin qubits.

29 pages, 4 figures

References in corpus (12)

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• Single Spin Magnetic Resonance
• A Magnon Scattering Platform
• Highly-tunable formation of nitrogen-vacancy centers via ion implantation
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Cited by in corpus (6)

• Quantum magnonics: when magnon spintronics meets quantum information science
• Magnon-mediated qubit coupling determined via dissipation measurements
• High Frequency Magnetometry with an Ensemble of Spin Qubits in Hexagonal Boron Nitride
• Kerr nonlinearity induced strong spin-magnon coupling
• Temperature-dependent second-harmonic generation from color centers in diamond
• Electric-Field-Induced Coherent Control of Nitrogen Vacancy Centers