Quantum-impurity relaxometry of magnetization dynamics
arXiv:1804.02417 · doi:10.1103/PhysRevLett.121.187204
Abstract
Prototypes of quantum impurities (QI), such as NV and SiV centers in diamond, have been recently growing in popularity due to their minimally invasive and high-resolution magnetic field sensing. Here, we focus on quantum-impurity relaxometry as a method to probe collective excitations in magnetic insulators. We develop a general framework that relates the experimentally-measurable quantum-impurity relaxation rates to the properties of a magnetic system via the noise emitted by the latter. We suggest that, when the quantum-impurity frequency lies within the spin-wave gap, quantum-impurity relaxometry can be effectively deployed to detect signatures of the coherent spin dynamics, such as magnon condensation, both in ferromagnetic and antiferromagnetic systems, as well as open prospects to nonintrusively probe spin-wave transport regimes in magnetic insulators.
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Cited by in corpus (51)
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