Nanoscale Detection of Magnon Excitations with Variable Wavevectors Through a Quantum Spin Sensor

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Nanoscale Detection of Magnon Excitations with Variable Wavevectors Through a Quantum Spin Sensor

Journal Article (2020)

Author(s)

Eric Lee-Wong (University of California)

Ruolan Xue (Harvard University)

Feiyang Ye (University of California)

Andreas Kreisel (University of Leipzig)

T. van der Sar (Kavli institute of nanoscience Delft, TU Delft - QN/vanderSarlab)

Amir Yacoby (Harvard University)

Chunhui Rita Du (University of California)

Research Group

QN/vanderSarlab

DOI related publication

https://doi.org/10.1021/acs.nanolett.0c00085

Spin waves Magnetic insulators Nitrogen vacancy magnetometry Quantum sensing

To reference this document use:

https://resolver.tudelft.nl/uuid:af07add9-a5db-4507-a884-5d20e3a2afb2

More Info

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Publication Year

2020

Language

English

Research Group

QN/vanderSarlab

Issue number

5

Volume number

20

Pages (from-to)

3284-3290

Abstract

We report the optical detection of magnons with a broad range of wavevectors in magnetic insulator Y
₃Fe
₅O
₁₂ thin films by proximate nitrogen-vacancy (NV) single-spin sensors. Through multimagnon scattering processes, the excited magnons generate fluctuating magnetic fields at the NV electron spin resonance frequencies, which accelerate the relaxation of NV spins. By measuring the variation of the emitted spin-dependent photoluminescence of the NV centers, magnons with variable wavevectors up to &tild;5× 10
⁷ m
^-1 can be optically accessed, providing an alternative perspective to reveal the underlying spin behaviors in magnetic systems. Our results highlight the significant opportunities offered by NV single-spin quantum sensors in exploring nanoscale spin dynamics of emergent spintronic materials.

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