Dynamic imaging of an antiferromagnetic domain wall via quantum-impurity relaxometry

Abstract

While spin textures in materials exhibiting zero net magnetization, such as antiferromagnetic domain walls (DWs), have attracted much interest lately due to their robustness against external magnetic noise, their generic detection via conventional magnetometry remains a challenging task. Here, we propose quantum relaxometry as a new route to image spin textures by probing the collective spin modes harbored by them. We investigate the Goldstone modes hosted by an antiferromagnetic domain wall and assess the relaxation rate of a quantum-spin sensor interacting with them. We show that such modes can be detected via relaxometry in some common antiferromagnets. Moreover, based on symmetry considerations, we propose a simple protocol to probe the individual dynamics of each mode.

References in corpus (7)

• Probing condensed matter physics with magnetometry based on nitrogen-vacancy centres in diamond
• Real-space imaging of non-collinear antiferromagnetic order with a single spin magnetometer
• Purely Antiferromagnetic Magnetoelectric Random Access Memory
• Superfluid spin transport through antiferromagnetic insulators
• Quantum-impurity relaxometry of magnetization dynamics
• Crystallographic Orientation Dependent Reactive Ion Etch in Single Crystal Diamond
• Scanning Diamond NV Center Probes Compatible with Conventional AFM Technology

Cited by in corpus (12)

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• Nanoscale mechanics of antiferromagnetic domain walls
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• Entangling Distant Spin qubits via a Magnetic Domain Wall
• Sensing chiral magnetic noise via quantum impurity relaxometry
• Quantitative study of the response of a single NV defect in diamond to magnetic noise
• Magnon dynamics in a Skyrmion-textured domain wall of antiferromagnets
• Local control of a single nitrogen-vacancy center by nanoscale engineered magnetic domain wall motions
• Room temperature relaxometry of single nitrogen-vacancy centers in proximity to $\alpha$-RuCl${}_3$ nanoflakes
• Harnessing spin-qubit decoherence to probe strongly-interacting quantum systems
• Spin-qubit Noise Spectroscopy of Magnetic Berezinskii-Kosterlitz-Thouless Physics