Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Probing thermal magnon current mediated by coherent magnon via
  nitrogen-vacancy centers in diamond   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.

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The categories of this paper are: atom-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: eess
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The categories of this paper are: cs
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The categories of this paper are: acc-phys
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The categories of this paper are: econ
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The categories of this paper are: adap-org
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The categories of this paper are: stat
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The categories of this paper are: nucl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg